Entries |
Document | Title | Date |
20080219410 | Phantom and method for quality monitoring of a medical system - A phantom for quality monitoring of a medical system, in particular a medical therapy system, or particle therapy system, is described. The phantom has a fixation device for coupling the phantom to a positioning device. In an aspect, a method for quality monitoring in a medical system, in particular a medical therapy system or particle therapy system is described, in which such a phantom is coupled via a fixation device to a positioning device and, with the aid of the positioning device, is brought to a predefined position. In another aspect, a particle therapy system has a treatment chamber, with a positioning device to which a phantom can be coupled so that the phantom can be brought to a predefined spatial position using the positioning device. | 09-11-2008 |
20080219411 | Mounting device for phantom, method for quality monitoring of a particle therapy system, and particle therapy system - A mounting device for phantoms for use in quality monitoring of a radiation therapy system is described. The mounting device is adapted such that a plurality of phantoms can be placed replicably in a defined position on the mounting device. A quality assurance procedure is performed by placing a plurality of phantoms on a mounting device, each phantom at a predefined position; positioning the mounting device in the radiation therapy system, so that one of the phantoms is located in a position intended for performing a quality monitoring procedure; and performing the procedure using one or more of the phantoms. | 09-11-2008 |
20080219412 | Methods and Devices for Quantitative Analysis of X-Ray Images - The present invention relates to network enabled analysis of x-ray images. Also described are devices comprising calibration phantoms; methods of using these devices; methods of formulating databases containing information regarding x-ray images; the databases themselves; and methods of manipulating the information and databases. | 09-11-2008 |
20080226037 | System and method for normalization and calibration of an imaging system using a variable thickness filter - A system and method for calibrating a radiation imaging system include a dual use variable thickness radiation filter having a slit in one part thereof such that in a first position a radiation beam passing through is not attenuated and in a second position the radiation beam is attenuated according to the total filter thickness in the path of the radiation beam. The filter may be formed of multiple movable plates or a single piece of stepped high density material. | 09-18-2008 |
20080226038 | Radiation System and Radiation Beam Quality Detector and Method - A detector array is disposed relative to a radiation source such that radiation from the radiation source over a predetermined time period is substantially similar across the detector array. The detector array includes radiation detectors operatively coupled to detector electronics. The radiation filter material is disposed at least partially between the radiation source and the detector array such that different portions of the detector array are exposed to radiation from the radiation source through either different radiation filter material thicknesses or different radiation filter material compositions during the predetermined time period. So configured, information regarding the radiation such as beam quality information for radiation pulses is collected and used to confirm the quality of the radiation source or to adjust data collected by the radiation system. | 09-18-2008 |
20080232555 | DEVICE AND METHOD FOR MONITORING SOLID-STATE DETECTORS - In a device and associated method for monitoring solid-state detectors, image segments of a test image (such as, for example, a dark current image) from solid-state detectors are evaluated and further usability of the solid-state detector is indicated using assessment criteria. | 09-25-2008 |
20080240364 | Phantom insert for quality assurance - An apparatus for performing quality assurance on a radiation treatment delivery system includes a housing, a target region, and alignment protrusions. The housing is penetrable by a radiation beam of a radiation source of the radiation treatment delivery system and translucent to an image guidance system of the radiation treatment delivery system. The target region is disposed within the housing and contrasts with the housing when imaged by the image guidance system. The alignment protrusions are disposed on the housing for aligning a film insert relative to the target region. | 10-02-2008 |
20080240365 | Method and Apparatus to Facilitate Forming Detector-Level Calibration Information for a High Energy-Based Scanner - The provision of calibration information for a given high energy-based scanner having a plurality of detectors can comprise forming ( | 10-02-2008 |
20080240366 | METHOD FOR THE CORRECTION OF LAG CHARGE IN A FLAT-PANEL X-RAY DETECTOR - A method for the correction of lag charges in a flat-panel X-ray detector makes it possible, for each integration phase of the detector, to determine an initial read phase situated just before said integration phase. The method of the invention enables the measurement, for each integration phase, of the charges present in the detector at the corresponding initial read phase, the production of a lag image from the latent charges measured in the initial read phase and the subtraction of the lag image from the raw image. The use of the measurement of charges enables the direct correction of the lag image in the acquisition without the use of a correction module as in the prior art. | 10-02-2008 |
20080260106 | METHOD AND SYSTEM FOR DRIFT CORRECTION OF SPECTRUM IMAGES - A method and system corrects for drift in spectrum images resulting from collection signals. Signals resulting from a scan are collected. A reference image is obtained for determining initial pixel locations. A correction image is extracted, validated and correction vectors generated. | 10-23-2008 |
20080279342 | Method and Apparatus for Auto-Calibration of a Ct Scanner - A method of and apparatus for automatically calibrating a computed tomography (“CT”) scanning system ( | 11-13-2008 |
20080285725 | METHOD AND APPARATUS FOR CALIBRATING AN X-RAY DIAGNOSTIC SYSTEM - The subject matter of the present application relates to methods for calibrating an X-ray diagnostic system and apparatus for use in the calibration methods. In one embodiment, the apparatus includes a position detection system having an acquisition unit. An X-ray phantom is disposed near the acquisition unit in a known position and/or orientation relative to a coordinate system of the position detection system. The X-ray phantom may be detachably mounted on the acquisition unit. | 11-20-2008 |
20080292062 | METHOD AND APPARATUS FOR HOT SWAPPING PORTABLE DETECTORS IN X-RAY SYSTEMS - Methods and apparatus are provided for hot swapping a portable detector to an imaging system. A portable detector having a unique identifier and calibration data is detected by an imaging system. The imaging system selects the calibration data for the detected portable detector. The imaging system uses the calibration data in the imaging process. In some embodiments, the selected calibration data can be stored in the portable detector or in the imaging system. In some embodiments, the calibration data is organized as both imaging system dependent and imaging system independent. In some embodiments, the imaging system integrates the portable detector and the associated calibration data into the operation of the imaging system. | 11-27-2008 |
20080292063 | Radiographic Calibration Apparatus - A radiographic calibration apparatus for supporting a calibration unit. The radiographic calibration apparatus includes a support structure, and this support structure or arrangement is used to support and selectively position the calibration unit with respect to a patient. A retaining member for use in connection with a calibration unit is also disclosed. | 11-27-2008 |
20080310598 | Method for calibrating dual-energy CT system and method of image reconstruction - A method for calibrating a dual-energy CT system and an image reconstruction method are disclosed to calculate images of atomic number and density of a scanned object as well as its attenuation coefficient images at any energy level. The present invention removes the effect from a cupping artifact due to X-ray beam hardening. The method for calibrating a dual-energy CT system is provided comprising steps of selecting at least two different materials, detecting penetrative rays from dual-energy rays penetrating said at least two different materials under different combinations of thickness to acquire projection values, and creating a lookup table in a form of correspondence between said different combinations of thickness and said projection values. The image reconstruction method is provided comprising steps of scanning an object with dual-energy rays to acquire dual-energy projection values, calculating projection values of base material coefficients corresponding to said dual-energy projection values based on a pre-created lookup table, and reconstructing an image of base material coefficient distribution based on said projection values of base material coefficients. In this way, images of atomic number and density of an object as well as its attenuation coefficient images can be calculated from the images of the distribution of base material coefficients. Compared with the prior art technique, the method proposed in the present invention has advantages of simple calibration procedure, high calculation precision and invulnerability to X-ray beam hardening. | 12-18-2008 |
20090046836 | X-RAY IMAGING SYSTEM AND METHOD FOR DEFINING OR CARRYING OUT CALIBRATION PROCESSES - X-ray imaging systems can have different modes of operation. There is a calibration process for each mode of operation. Conventionally, the overall system is actuated during the calibration process in exactly the same way as when operating the x-ray imaging system ( | 02-19-2009 |
20090052631 | System and Method for Information Embedding and Extraction in Phantom Targets for Digital Radiography Systems - A system and method for embedding in a phantom target used in digital radiography systems information specific to the phantom target, such as serial number, phantom target type, precision landmarks, composition, physical properties of the dedicated targets and the like. The information is encoded and represented by small holes in the phantom target that can easily and unambiguously be detected by decoding-software acting on the radiation image of the phantom target. A look-up table or any other flexible data structure defines the functionality of the holes detected based on their image-location. Regions of interest can be located based on an internal coordinate system defined accurately by the sub-pixel position of the hole centres. | 02-26-2009 |
20090060145 | POSITIONING ADJUSTMENT OF A MOBILE RADIOLOGY FACILITY - The invention concerns a device for detecting a faulty positioning between a first element and a second element comprising an electromagnetic wave emitting unit designed to be secured to the first element and an electromagnetic wave receiving and processing unit designed to be secured to the second element. The latter unit co-operates with the electromagnetic wave emitting unit to detect a faulty positioning of the first element relative to the second element. When used for a mobile radiology facility, the first element is, for example, an X-ray generator, and second element is, for example, a radiological image sensor. | 03-05-2009 |
20090067581 | UNIVERSAL X-RAY TEST BED - Systems and methods presented herein provide for the testing and reconfiguration of x-ray devices. In one embodiment, a test bed effectuates testing of an acquired x-ray device to determine a cause of the inoperability of the device. The x-ray device test bed may be provided to test a plurality of x-ray devices and, therefore, readily adaptable to such devices. The x-ray device test bed may include a mount for an x-ray tube. A variable power supply may be coupled to the x-ray tube to provide the requisite high-voltage electrical energy thereto. The x-ray device test bed may also include a mount for an imaging module (e.g., a “flat-panel sensor”). A processor may be coupled to the imaging module to determine the operational characteristics thereof. If certain x-ray components are deemed inoperable, the x-ray components may be replaced such that the x-ray device may be reintroduced to a medical industry segment. | 03-12-2009 |
20090067582 | IMAGING TARGET FOR TESTING QUALITY OF MULTIPLE-MAGNIFICATION FOCUS AND IMAGE CO-REGISTRATION - An imaging target, suited for use in multi-modal imaging systems, includes test patterns for testing quality of both focus and co-registration for multiple magnifications and multiple modalities of operation of a multimodal imaging system. | 03-12-2009 |
20090067583 | Method for determining an imaging rule and method for generating a 3D reconstruction - It is possible that at a predetermined position of the imaging components of a radiographic imaging system the object is not fully viewed. The object can be a calibration phantom, which means that it is not possible to directly determine an imaging rule with the aid of the calibration phantom at this position of the imaging components. According to the invention, an imaging of the calibration phantom at a different position takes place and an imaging rule for this position is determined. This is then converted, provided a movement parameter is known which describes the movement from the position with the record of the calibration phantom to a different position. The imaging rule obtained in this way can be further improved, e.g. with the aid of a recording of the calibration phantom from the position in question, including if the calibration phantom is not completely imaged. | 03-12-2009 |
20090074152 | Methods of Performing PET Sinogram Quality Check - A method for determining quality of sinograms produced by a medical imaging device. The method may include placing a uniform phantom object in the field of view of the medical imaging device; acquiring one or more phantom sinograms of the uniform phantom object; establish a set of parameters for the acquired one or more phantom sinograms; and determine, based on pre-set ranges of the parameters, the quality of sinograms produced by the medical imaging device. The parameters may be one or more parameters of a group of parameters consisting of block uniformity, block efficiency, randoms rate, scanner efficiency, and scatter ratio. | 03-19-2009 |
20090080621 | Method, System and Device for Automated Configuring of an X-ray Source Apparatus - A method, a system and a device for automated configuration of a high power X-ray source apparatus ( | 03-26-2009 |
20090116621 | RADIOSTEREOMETRIC CALIBRATION CAGE - A calibration cage for use in Roentgen Stereophotogrammetric Analysis (RSA), comprising a biplanar configuration of two compartments, each with a fiducial plate at the bottom and a control plate at the top and parallel thereto, the fiducial and control plates of one compartment being oriented at approximately 90° to fiducial and control plates of the other compartment such that a region of interest is positioned on one side of the fiducial and control plates of both compartments. | 05-07-2009 |
20090147925 | CALIBRATION TOOL AND A METHOD OF CALIBRATING AN IMAGING SYSTEM - A method of calibrating an imaging system includes placing a calibration tool in a position relative to the imaging system where an object to be imaged in normal use of the system would be placed. An image of the calibration tool is taken and the resulting image is used to calibrate the imaging system. | 06-11-2009 |
20090161833 | Radiographic Calibration - By providing holes ( | 06-25-2009 |
20090161834 | METHOD OF CALIBRATION OF DIGITAL X-RAY APPARATUS AND ITS EMBODIMENTS - The inventions (variants) are intended for improvement of calibration precision of digital X-ray apparatuses: computed tomographs, as well as digital X-ray apparatuses equipped with C-arm and U-arm type stands, which method is based on calculation of mechanical instability of the stand. Calibration method for X-ray apparatus, in which one or two X-ray contrast balls of different diameters are placed in the scanning field, excluding its centre, a series of images of the scanning field with different angles of the stand rotation are obtained, the X-direction and Y-direction regular components of mechanical instability of the X-ray apparatus stand are determined using the coordinates of projection centre of the ball, X-direction and Y-direction calibration modifications set for mechanical instability of the stand are formed, which modifications are used for correction of the images, according to the invention the additional regular component of mechanical instability of digital X-ray stand is determined using the scales of projections, and the calibration data set for mechanical instability of the stand, which includes the scale calibration modifications, is formed. | 06-25-2009 |
20090190723 | CALIBRATION PHANTOM FOR QUALITY ASSURANCE OF IMAGE-BASED RADIOTHERAPY APPARATUS - A calibration phantom for quality assurance of an image-based radiotherapy apparatus The calibration phantom includes a body comprising a cylindrical acryl member having a predetermined diameter, the body having a center hole at a center axis thereof and a plurality of through-holes in outer circumferential portions thereof at a predetermined interval from the center hole; round stick-type density bars inserted into corresponding through-holes of the body and made of materials each with different densities; an acrylic cover detachably coupled with both ends of the body and having the same diameter as the body; and a plurality of bolts closely fastening the body with the cover by extending through the cover and the body and coupling with the nuts and each made of different materials. The cross-sectional shapes of the density bars and bolts appear on the image scanned by the CT apparatus and the radiotherapy apparatus. | 07-30-2009 |
20090245473 | X-RAY IMAGE APPARATUS AND DEVICE FOR AND METHOD OF CALIBRATING AN X-RAY IMAGE APPARATUS - A calibration device ( | 10-01-2009 |
20090268876 | METHODS OF ASSESSING PERFORMANCE IN AN IMAGING SYSTEM - A system, method, and computer readable medium for facilitating the assessment of performance quality of an imaging system having a sensor subsystem. An imaging mode of operation of the imaging system is selected and at least one current set of digital image data of an imaging phantom device is acquired with the imaging system via the sensor subsystem. The currently acquired set of digital phantom image data is automatically compared to at least one previously acquired set of digital phantom image data representing a standard image of quality corresponding to the selected imaging mode of operation and the imaging phantom device to automatically determine if at least one sensor parameter of the sensor subsystem has changed. | 10-29-2009 |
20090268877 | METHOD AND SYSTEM FOR CALIBRATING AN X-RAY PHOTOELECTRON SPECTROSCOPY MEASUREMENT - A method and a system for calibrating an X-ray photoelectron spectroscopy (XPS) measurement are described. The method includes using an X-ray beam to generate an XPS signal from a sample and normalizing the XPS signal with a measured or estimated flux of the X-ray beam. The system includes an X-ray source for generating an X-ray beam and a sample holder for positioning a sample in a pathway of the X-ray beam. A detector is included for collecting an XPS signal generated by bombarding the sample with the X-ray beam. Also included are a flux detector for determining a measured or estimated flux of the X-ray beam and a computing system for normalizing the XPS signal with the measured or estimated flux of the X-ray beam. | 10-29-2009 |
20090279672 | Multi-functional medical imaging quality assurance sensor - The present invention relates to a method of providing a quality assurance program for a medical imaging examination, including measuring quality assurance metrics, including at least one of motion, contrast resolution, spatial resolution, radiation does, noise, and anatomic positioning, using a quality assurance sensor; performing an analysis the quality assurance metrics data, comparing the data with norms for same; and providing quality assurance recommendations in real-time for adjustment of the quality assurance metrics during the examination. The sensor includes a sensor body having an upper surface and a flat lower surface, the flat lower surface being divided into more than one portioned segment; a plurality of sensors and test patterns embedded into said flat surface within each portioned segment; wherein the sensors and test patterns in each portioned segment take predetermined quality assurance metrics, to optimize image acquisition during the examination. | 11-12-2009 |
20090285365 | SYSTEM FOR AUTOMATIC TESTING OF A DIGITAL X-RAY DETECTOR - The present invention relates to radiography, including medical radiography, specifically to the apparatus for controlling the technical characteristics of digital radiographic devices, and is intended to maintain self-diagnostics of digital X-ray detectors. The self-diagnostics system of digital X-ray detectors comprises a radiographic screen | 11-19-2009 |
20090285366 | DETERMINING CALIBRATION INFORMATION FOR AN X-RAY APPARATUS - The present invention relates to a method for determining calibration information which includes information on a spatial relationship between an x-ray apparatus reference frame and a three-dimensional scan reference frame, comprising the following steps:
| 11-19-2009 |
20090296893 | Calibration of a multi-plane x-ray unit - For calibrating a multi-plane X-ray unit, an internal matrix mapping coordinate system internal to the unit onto coordinate system of a first radiographic plane is predefined in a reference projection geometry. An external matrix mapping coordinate system external to the unit onto coordinate system of the first plane is determined from image data captured by the first plane at calibration points and coordinates of the calibration points. An external matrix mapping coordinate system external to the unit onto coordinate system of a second radiographic plane is determined from image data captured by the second plane at the calibration points and the coordinates of the calibration points. A measure of position of the second plane with respect to coordinate system internal to the unit or with respect to the first plane is determined from the internal and external matrix of the first plane and the external matrix of the second plane. | 12-03-2009 |
20090296894 | UNIVERSAL X-RAY TEST BED - Systems and methods presented herein provide for the testing and reconfiguration of x-ray devices. In one embodiment, a test bed effectuates testing of an acquired x-ray device to determine a cause of the inoperability of the device. The x-ray device test bed may be provided to test a plurality of x-ray devices and, therefore, readily adaptable to such devices. The x-ray device test bed may include a mount for an x-ray tube. A variable power supply may be coupled to the x-ray tube to provide the requisite high-voltage electrical energy thereto. The x-ray device test bed may also include a mount for an imaging module (e.g., a “flat-panel sensor”). A processor may be coupled to the imaging module to determine the operational characteristics thereof. If certain x-ray components are deemed inoperable, the x-ray components may be replaced such that the x-ray device may be reintroduced to a medical industry segment. | 12-03-2009 |
20090310754 | X-RAY DETECTOR GAIN CALIBRATION DEPENDING ON THE FRACTION OF SCATTERED RADIATION - It is described a gain calibration for a two-dimensional X-ray detector ( | 12-17-2009 |
20100027763 | METHOD OF CALIBRATING A RADIATION THERAPY SYSTEM - The present invention concerns a method, a system, a measurement tool and computer readable medium for determining a predetermined position of a positioning system in a radiation therapy system comprising a radiation therapy unit relatively a fixed radiation focus point of the radiation therapy unit. The method comprises positioning ( | 02-04-2010 |
20100061522 | METHOD TO CORRECT IMAGING ERRORS OF AN X-RAY IMAGE INTENSIFIER SYSTEM AND ASSOCIATED X-RAY IMAGE INTENSIFIER SYSTEM - An image intensifier system has an image converter tube to convert incident x-ray radiation into visible light and a digital camera system optically downstream of the image converter tube. The camera system has an image sensor to convert the incident, visible light into digital images, and an electronic image processing unit is provided for post-processing of the digital images. In such a system and a method for correcting image distortion errors that occur therein, characteristic data of a magnetic field present in the image converter tube are determined with the aid of a magnetic field probe arranged within the image converter tube or in its environment, an imaging error resulting from the presence of the magnetic field is quantitatively defined using the determined characteristic data, one or more parameters of a correction map leading to the correction of the imaging error are determined based on this, and the correction map that is established in this way is applied to the digital images in the electronic image processing unit. | 03-11-2010 |
20100074413 | DEVICE FOR OPTIMIZATION OF EXPERIMENTAL PARAMETERS ON SYNCHROTRON BEAM LINES - Enhanced methods and a device enabling a plurality of tools for implementing a plurality of procedures for the accurate alignment and calibration of multiple components of the experimental set up at a synchrotron beam line are provided. The device includes an alignment pin or needle for centering a sample rotation axis. The device includes a YAG crystal for visualization of the beam and beam alignment and a metal foil for transmission or fluorescence measurements used for the monochromator calibration. The same, or different foils, or powders, or polymers, can be used for obtaining powder rings for finding the direct beam coordinates, for centering the beamstop on the direct beam and for calibration of the sample-to-detector distance. | 03-25-2010 |
20100074414 | Dose measuring method, and phantom and X-ray radiographic device used in dose measuring method - The present invention provides a dose measuring method which can more easily measure radiation doses in the whole region to which X-rays are radiated, and a phantom and an X-ray radiographic device which are used in the dose measuring method. In measuring doses by mounting a film-type dosimeter on a phantom, the film-type dosimeter is arranged on the phantom along a plane which includes a center axis on which the rotational center of a rotating X-ray source is positioned or along a plane which traverses the center axis. Particularly, the phantom is divided into at least a first base body and a second base body along a plane along which the film-type dosimeter is arranged, and the film-type dosimeter is sandwiched and fixed by the first base body and the second base body. | 03-25-2010 |
20100124315 | METHODS AND SYSTEM FOR CALIBRATING AND CORRECTING A DETECTION SYSTEM - A method for calibrating a detection system including a multi-focus X-ray source includes performing a scan of a calibration material using the detection system to acquire scan data, determining a diffraction profile of the calibration material using the scan data, deriving an actual scatter angle using the determined diffraction profile, deriving an offset angle using the determined actual scatter angle, storing the derived offset angle, and generating a table including the stored offset angle. | 05-20-2010 |
20100128852 | Detector Characterization and Calibration - Characterization, calibration and gain stabilization of gamma ray detectors are carried out using one or more spectral features that are present in the background radiation. Such a spectral feature may be the spectral peak associated with Potassium-40 nuclide. The disclosed methods, apparatus and computer program products enable uninterrupted operation of gamma ray detection systems, while eliminating the costs associated with the procurement and integration of external reference sources into these systems, and without compromising the sensitivity of the detection system. | 05-27-2010 |
20100183124 | Gain Calibration and Correction Technique for Digital Imaging Systems - A gain correction and calibration technique for digital imaging systems is provided. In one embodiment, a method may include acquiring a plurality of dark images via a digital detector of an X-ray system. Acquiring the plurality of dark images may include acquiring data from a plurality of data channels of the digital detector during an analog test mode of the digital detector in which calibration voltages are applied to the data channels. The method may also include calibrating a channel gain map of the detector based on the plurality of dark images. Additional systems, methods, and devices are also disclosed. | 07-22-2010 |
20100189227 | SYSTEM AND METHOD TO MANAGE MAINTENANCE OF A RADIOLOGICAL IMAGING SYSTEM - A system and method to predict a failure of an imaging system that includes a radiation source having an x-ray tube assembly is provided. The system includes a storage medium having a plurality of programmable storage instructions to instruct a processor to perform the steps of acquiring an age of the x-ray tube assembly, calculating a baseline probability of a survivability of the tube assembly for a remaining time period dependent on the age of the tube assembly, acquiring measurement of at least one operating parameter of the x-ray tube assembly, and automatically changing the baseline probability of a survivability of the imaging system for the remaining time period in response to the measurement of the at least one operating parameter of the x-ray tube assembly. | 07-29-2010 |
20100195804 | METHOD FOR CALIBRATION OF A CT SCANNER - A method for calibration of a CT scanner having an x-ray source and a detector having an axial extent in the scanner, the source being rotatable about an epicenter between the source and detector, the method comprising:
| 08-05-2010 |
20100246778 | Method for Calibrating the Position of a Laser Fan Beam Relative to the Projection Geometry of an X-Ray Device and X-Ray Device - For detecting the relative location of a laser or laser fan beam relative to the x-ray geometry of an x-ray device, a method for calibrating the position of the laser fan beam generated by a laser in relation to the projection geometry of the x-ray device is proposed. The x-ray device comprises an x-ray imaging system featuring an x-ray source and an x-ray detector. The x-ray source, the x-ray detector, the laser, and an imaging facility are arranged on a support. An optical x-ray calibration phantom is used for the calibration. The position of the imaging facility relative to the projection geometry is determined. The position of the laser fan beam relative to the imaging facility is determined. The position of the laser fan beam relative to the projection geometry is reconstructed. | 09-30-2010 |
20100303210 | PHANTOM OBJECT FOR THE QUALITY CONTROL OF A DEVICE FOR RADIATION THERAPY TREATMENT AND METHODS FOR ITS MANUFACTURE AND ITS USE - This phantom object is designed for a Winston-Lutz test on a device for radiation therapy treatment comprising a patient support having a rotation axis (V), a stand having a rotation axis (H) and a collimator having a rotation axis (C), locating means being provided for visually representing the theoretical positions (V′, H′, C′) of the three axes (V, H, C). A spherical ball is positioned at the center of a sphere in a material of electron density lower than that of the ball, the ball and the sphere both constituting the phantom object. The sphere has on its outer surface means for a visual alignment with the locating means allowing a positioning of the phantom object at the point of convergence of the three axes (V′, H′, C′). | 12-02-2010 |
20100329432 | Positioning an Object Based on Aligned Images of the Object - Embodiment of the invention describes a system and a method for positioning an object from a first pose to a second pose. The method displays concurrently a first image and a second image on a display device, wherein the first image and the second image represent respectively the first pose and the second pose of the object. The method updates, in response to a change in a pose of the display device, the second image such that an alignment of the first image and the second image on the display device depends on the change in the pose of the display device, and positions the object from the first pose to the second pose based on the change in the pose of the display device. | 12-30-2010 |
20110019802 | UNIVERSAL X-RAY TEST BED - Systems and methods presented herein provide for the testing and reconfiguration of x-ray devices. In one embodiment, a test bed effectuates testing of an acquired x-ray device to determine a cause of the inoperability of the device. The x-ray device test bed may be provided to test a plurality of x-ray devices and, therefore, readily adaptable to such devices. The x-ray device test bed may include a mount for an x-ray tube. A variable power supply may be coupled to the x-ray tube to provide the requisite high-voltage electrical energy thereto. The x-ray device test bed may also include a mount for an imaging module (e.g., a “flat-panel sensor”). A processor may be coupled to the imaging module to determine the operational characteristics thereof. If certain x-ray components are deemed inoperable, the x-ray components may be replaced such that the x-ray device may be reintroduced to a medical industry segment. | 01-27-2011 |
20110085645 | Calibration of Imaging Geometry Parameters - Some embodiments include determination of a first projection image of a phantom based on first imaging geometry parameters associated with a first radiation-based imaging system and on a virtual model of the phantom, acquisition of a second projection image of the phantom based on radiation emitted from the first radiation-based imaging system, the phantom located at a first position, and determination of a difference between the first projection image and the second projection image. | 04-14-2011 |
20110096911 | Quality Assurance Phantom for Digital Dental Imaging and Related Method - A quality assurance phantom for intraoral digital dental imaging and related method. The quality assurance phantom measures three different physical properties of an imaging system: dynamic range, contrast detectability, and spatial resolution. The phantom comprises a dynamic range portion having a plurality of steps, each step of the plurality of steps having a different thickness from the other steps; a contrast detail portion having a uniform thickness and a plurality of wells formed therein; a spatial resolution portion having a plurality of line sets, each line set of the plurality of line sets having different line spacing from the other line sets; an attenuating body having uniform thickness positioned between the source and the contrast detail portion and the spatial resolution portion; and a lead mass adjacent to the dynamic range portion. | 04-28-2011 |
20110116606 | MEDICAL IMAGING SYSTEM FOR ACCURATE MEASUREMENT EVALUATION OF CHANGES - A system and method for nodule boundary visualization superimposed on a scan image, including generating phantom image measurements of at least one synthetic calibration object in relation to a body to calibrate a scanner; acquiring a first image of a nodule on the calibrated scanner; computing and marking a boundary on the image; displaying the first image with the boundary superimposed over the first image; presenting the initial boundary to a user for modification where the user can add one or more modification points to the image to create a modified boundary that is encompassed by the one or more modification points; once the user has marked the one or more modification points on the image, computing an updated boundary that adapts to include the new points. | 05-19-2011 |
20110150187 | APPARATUS AND METHOD FOR CALIBRATING AN X-RAY TUBE - An apparatus and method for calibrating an x-ray tube include a computer programmed to acquire a starter voltage/current value corresponding to a width, a length, or a position of a target focal spot capable of being generated by the x-ray tube. The computer is programmed to generate an electron beam and to steer the electron beam based on the starter voltage/current value. The computer is also programmed to steer the electron beam based on a value adjusted from the starter voltage/current value. The computer is programmed to calculate a final voltage/current value that is configured to generate the width, length, or position of the target focal spot based on the starter voltage/current value and the adjusted starter voltage/current value. | 06-23-2011 |
20110293074 | DYNAMIC FLOW IMAGING PHANTOM AND MODEL THEREFOR - A phantom for simulation of perfusion, for use in dynamic flow imaging. The phantom includes a first compartment having a first inlet and a first outlet, and a second compartment having a second outlet. The first and the second compartments have fluid communication with each other, to simulate perfusion between the first and the second compartments. The first and the second outlets are separately controllable to adjust outflow of fluid from each compartment and to adjust fluid pressure in each compartment, thereby controlling rates of communication of fluids between the first and the second compartments. | 12-01-2011 |
20120087481 | CORRECTION FOR SOURCE SWITCHING IN MULTI ENERGY SCANNER - The techniques described herein provide for correcting projection data that comprises contamination due to source switching in a multi energy scanner. The correction is a multi-neighbor correction. That is, it uses data from at least two other views of an object (e.g., generally a previous view and a subsequent view) to correct a current view of the object. The multi-neighbor correction may use one or more correction factors to determine how much data from the other two views to use to correct the current view. The correction factor(s) are determined based upon a calibration that utilizes image space data and/or projection space data of a phantom. In this way, the correction factor(s) account for source leakage that occurs in multi energy scanners. | 04-12-2012 |
20120128131 | Device And Method For Calibrating An X-Ray Detector, Calibration Apparatus And X-Ray Apparatus - A device and a method are disclosed, for energetic calibration of a photon-counting X-ray radiation detector by way of X-ray fluorescence radiation. The device includes a plurality of specifically selected elements, of which each element, upon being irradiated with electrons or with high-energy radiation, emits photons of X-ray fluorescence radiation of at least one specific or characteristic energy. The photons of X-ray fluorescence radiation of the at least one specific or characteristic energy are then useable or are used for energetic calibration of the photon-counting X-ray radiation detector. A calibration apparatus and an X-ray apparatus are also disclosed, which include such a device. | 05-24-2012 |
20120128132 | PHANTOM FOR CONTRAST IMAGING CALIBRATION - An imaging phantom for contrast imaging calibration. The phantom includes a body defining at least one cavity having a directional configuration corresponding to at least one pre-determined direction of motion of the phantom. The phantom also includes at least one imaging capsule configured to match and be contained in the at least one cavity. The imaging capsule comprises a material having an imaging contrast different from that of the body. | 05-24-2012 |
20120155617 | PHANTOM FOR SPECTRAL CT IMAGE SYSTEM CALIBRATION - A phantom includes a housing enclosing an interior volume and having a plurality of passages formed therein, wherein each passage is fluidly isolated from the interior volume. First and second inserts are included and configured to be positioned in a first passage of the plurality of passages and include materials having a known material density. The material is selected from iodine, hydroxyapatite (HAP), tricalcium phosphate (TCP), body fat, fatty plaque, sodium chloride (NaCl), gold (Au), and iron (Fe). The material of the inserts can be different materials or the same material at different densities. | 06-21-2012 |
20120163557 | METHODS AND PHANTOMS FOR CALIBRATING AN IMAGING SYSTEM - A method for calibrating a medical imaging system includes performing an initial calibration of the imaging system, at a manufacturing site fabricating the imaging system, using a plurality of phantoms, shipping one of the phantoms to an installation site installing the imaging system, and performing a final calibration, at an installation site of the imaging system, using the shipped phantom. A set of calibration phantoms is also described herein. | 06-28-2012 |
20120207283 | TEST PHANTOM FOR TOMOGRAPHIC IMAGING AND NOTABLY FOR BREAST TOMOSYNTHESIS - A test phantom for tomographic imaging, the phantom comprising an assembly of elementary structures defining a 3D mesh, wherein each elementary structure comprises a chief constituent material corresponding to an X-ray attenuation simulating a glandularity, wherein the elementary structures are in at least two types of chief constituent materials corresponding to different X-ray attenuations. | 08-16-2012 |
20120300912 | APPARATUS AND METHOD FOR MANAGING RADIATION DOSES AND RECORDING MEDIUM FOR IMPLEMENTING THE SAME - An apparatus for managing radiation doses is provided. The apparatus includes an information extraction unit configured to extract information about a patient to be examined, information about an image acquired by examining a bodily region of the patient using a radiographic apparatus, and information about the examination performed by the radiographic apparatus, a radiation dose calculation unit configured to calculate, using the image information, an effective dose generated by the radiographic apparatus when acquiring the image, and a dose data storage unit configured to store effective dose data in a database, the effective dose data including the calculated effective dose, the patient information, and the examination information. | 11-29-2012 |
20120314844 | AUTOMATIC HEALTH DETECTION FOR MOTION AXES IN MEDICAL LINEAR ACCELERATORS - In a method of detecting the health of a motion axis in a radiation system including a motor operable to move a load between a first end and a second end, data on an electrical parameter of the motor is collected as the motor moves in the certain range. At least one indicator of the electrical parameter including a maximum, a minimum, an average, and a standard deviation of the electrical parameter is determined and compared with a provided value or range of values indicative of the health of the axis. The health of the motion axis is determined using the comparison of the at least one indicator and the provided value or range of values. | 12-13-2012 |
20130083901 | METHOD AND DEVICE FOR DETERMINING THE WEAR OF AN X-RAY ANODE - A method and a device for determining the wear of an X-ray anode having an anode plate are provided. The method includes determining a reference value for a parameter that characterizes a property influenced by the dependence of an angle between radiation generated by the X-ray anode and the anode plate. The method also includes determining a value for the parameter after a specific operating time. The wear is established by comparing the determined value for the parameter with the reference value and correlating a deviation of the determined value for the parameter from the reference value with a wear state of the X-ray anode. | 04-04-2013 |
20130089186 | X-RAY CALIBRATION DEVICE - An x-ray calibration device includes a core including a first material with a first x-ray attenuation coefficient. The core defines a cavity that is configured to receive a plug of a different x-ray attenuation coefficient in order to alter the x-ray attenuation coefficient of the x-ray calibration device. The x-ray calibration device also includes an outer layer at least partially surrounding the core. The outer layer includes a second material with a second x-ray attenuation coefficient, where the second x-ray attenuation coefficient is lower than the first x-ray attenuation coefficient. | 04-11-2013 |
20130114799 | RADIATION IMAGING APPARATUS AND PHANTOM USED FOR THE SAME - In the imaging space provided by a panoramic imaging apparatus, a phantom is arranged. The phantom is located to a predetermined tomographic plane and includes markers which image known positional information with an X-ray beam. The X-ray beam from an X-ray source is acquired as X-ray transmission data by a detector, and a panoramic image is produced using the data. Based on known positional information of the markers and information of marker positions in the panoramic image, distance information (Rs, Rd) between the X-ray tube and the detector and height information (B | 05-09-2013 |
20130121478 | RADIATION DETECTOR CALIBRATION USING VOLTAGE INJECTION - Among other things, one or more systems and/or techniques for calibrating a direct conversion detector array are provided. An electrical charge is generated on an interface of a photoconductor (e.g., amorphous selenium) of the detector array when there is a change in voltage that is applied to the photoconductor. Such a change in voltage may occur because the voltage that is supplied to the photoconductor by a power supply is changed. The changed voltage causes an electrical charge to be produced, or causes a change in the net charge density at an interface of the photoconductor, that is substantially similar to the electrical charge that may be produced when radiation impinges the detector array. In this way, calibrations of the detector array (e.g., the generation of a uniformity map, defect table, etc.) may be performed without the emission of radiation and onsite or outside of a factory setting. | 05-16-2013 |
20130156163 | METHOD AND APPARATUS FOR RECONSTRUCTING AN IMAGE OF AN OBJECT - A method for reconstructing an image of an object includes performing an air calibration on an imaging system to generate set of air calibration data, estimating an x-ray spectrum using the air calibration data, and reconstructing an image of an object using the estimated x-ray spectrum. An imaging system and a non-transitory computer readable medium are also described herein. | 06-20-2013 |
20130156164 | EVALUATION AID - The present invention provides an evaluation aid which can be used as a phantom (imitation lesion) when a digital X-ray image thereof is taken and then evaluation is carried out through the digital X-ray image, and especially an evaluation aid which can be used for easily evaluating image qualities of a digital X-ray image for X-ray absorption parts having different X-ray absorption ratios at once. The evaluation aid of the present invention is adapted to be used for taking a digital X-ray image thereof through which evaluation is carried out, and contains a substrate (plate-like body) including a plurality of regions having different X-ray absorption ratios; and step members provided on the plate-like body so as to correspond to the plurality of regions, respectively, each step member including a plurality of subregions having different X-ray absorption ratios. It is preferred that thicknesses and/or constituent materials of the plurality of regions of the substrate are different from each other, so that these regions have the different X-ray absorption ratios. | 06-20-2013 |
20130170627 | CALIBRATION AND CORRECTION PROCEDURES FOR DIGITAL RADIOGRAPHY DETECTORS SUPPORTING MULTIPLE CAPTURE MODES, METHODS AND SYSTEMS FOR SAME - Embodiments of radiographic imaging systems and/or methods can operate a digital radiography detector in a multiple modes, where characteristics such as an exposure integration time and dark images (e.g., number timing integration time, etc.) for first and second modes are different. The digital radiography detector can be coupled to a memory that can store a first set of one or more calibration maps for the first mode and a second set of one or more calibration maps for the second mode and a processor. In one embodiment, the processor can form a first calibration-corrected exposure image by modifying a first exposure image from the first mode using the first set of calibration maps and a second calibration-corrected exposure image by modifying a second exposure image from the second mode using the second set of calibration maps in combination with calibration maps for the first mode. | 07-04-2013 |
20130188782 | OPTICAL ADJUSTMENT DEVICE - An optical adjustment device has a laser unit with at least one laser radiation source as well as an adjustment phantom which is arranged relative to the laser unit such that laser radiation emitted by the laser unit strikes the adjustment phantom. A fluorescent medium) is applied on the adjustment phantom, the fluorescent medium being designed to emit light of a different wavelength from the laser radiation upon being struck by laser radiation. This light is detected by a photodetector that is at a location spatially separated from the adjustment phantom, such as at the laser unit. | 07-25-2013 |
20130195255 | Calibration Phantom Device and Analysis Methods - This invention relates to a small pocket phantom designed to estimate the fundamental properties of imaging scanning acquisition including 3D resolution, noise, and scanner attenuation performance for different materials, together with an automated phantom analysis algorithm. | 08-01-2013 |
20130230150 | MEASUREMENT ARRANGEMENT FOR A COMPUTED TOMOGRAPHY SCANNER - A method for operating a measurement arrangement for a computer tomograph. The measurement arrangement has a radiation source of invasive radiation and a flat image detector with scintillation layer and a photocell array of photocells for detection of radiation from the radiation source. A calibration object is arranged between the radiation source and the flat image detector, and at least one radiation image of the calibration object is recorded with the flat image detector. From known dimensions of the calibration object and from the at least one radiation image, a distortion error, which occurred as a result of a distortion of the flat image detector, is determined as a function of the location in the photocell array (device | 09-05-2013 |
20130251111 | METHOD FOR ENERGY CALIBRATING QUANTUM-COUNTING X-RAY DETECTORS IN A DUAL-SOURCE COMPUTED-TOMOGRAPHY SCANNER - A method is disclosed for energy calibrating quantum-counting x-ray detectors in an x-ray installation including at least two x-ray systems turnable around a center of rotation. A target, for producing x-ray fluorescence radiation, is positioned between the first x-ray source and first x-ray detector and irradiated with x-radiation of the first x-ray source in such a way that x-ray fluorescence radiation which strikes the second x-ray detector from the target is produced by the x-radiation of the first x-ray source. The second x-ray detector is then energy calibrated by way of the x-ray fluorescence radiation of the target. The first x-ray detector can be energy calibrated in the same way with the aid of the x-radiation of the second x-ray source. With the proposed method, the x-ray detectors of a dual-source CT x-ray installation can be calibrated with little expenditure under conditions close to those of the system. | 09-26-2013 |
20130308759 | AIR BEARING DYNAMIC Z-AXIS BALANCING - A medical imaging system includes a stationary gantry and a rotating gantry that rotates around an examination region about a z-axis. An air bearing rotatably couples the rotating gantry to the stationary gantry. A radiation source is affixed to the rotating gantry and rotates with the rotating gantry and emits radiation that traverses the examination region. A detector array is affixed to the rotating gantry on an opposite side of the examination region with respect to the radiation source and detects radiation traversing the examination region. A dynamic z-axis imbalance determination system determines an imbalance of the rotating gantry in the z-axis direction directly from the air bearing, and the determined imbalance is used to position a balance mass affixed to the rotating gantry in the z-axis direction, thereby balancing the rotating gantry along the z-axis. | 11-21-2013 |
20130322605 | METHOD FOR DETERMINATION OF GEOMETRICAL SENSOR SHIFTS IN FLAT PANEL X-RAY IMAGE DETECTORS - The invention relates to the method for measuring of geometrical shift in flat panel x-ray image sensors using a test device. A test device comprising at least two edge test devices is placed on the detector's operating surface. The test device is exposed to x-rays in order to get its x-ray image where ROIs having pixels coordinates corresponding to the edge of each test device are identified. The pixel coordinates are used to determine sensor geometrical shifts considering minimum value of an objective function. Technical result involves expansion of technical means of definite application and a possibility to measure sensor geometrical shift with sufficient accuracy. | 12-05-2013 |
20140016759 | COMPOUND 6D-OFFSET SIMULATING PHANTOM AND QUALITY ASSURANCE PROGRAM FOR PRECISION IMAGE-GUIDED RADIOTHERAPY AND RADIOSURGERY - This invention provides a device for checking the performance of an image-guided radiation therapy (IGRT) apparatus. The device (referred to here as a phantom) has a central body with detectable markers, rotatably suspended on a ball joint so that the pitch, roll, and yaw may be adjusted. The body is secured against a base plate, which in turn may be positioned laterally, longitudinally, and vertically within the patient treatment area. Thus, the phantom can be adjusted through six degrees of freedom so as to simulate patient positioning. To perform quality control, the phantom is secured at a predetermined offset, and the position is detected by the IGRT apparatus. The robotic couch is then allowed to compensate, a second measurement is made. The measured values are compared with the predetermined offset to assess both the accuracy in detecting the position of the phantom, and the accuracy of the mechanical correction. | 01-16-2014 |
20140037072 | INFORMATION DETECTION APPARATUS, PHANTOM INFORMATION RECORDING APPARATUS AND OPERATION METHOD THEREOF - A material information detection apparatus, a phantom information recording apparatus, and operation methods for the apparatuses are provided. The material information detection apparatus includes a database configured to store phantom information obtained by projecting a multi-energy X-rayon a phantom comprising a plurality of materials, an input device configured to receive a plurality of pieces of object information per energy level, the object information obtained by projecting a multi-energy X-ray on an analysis object, and a detector configured to detect information related to materials constituting the analysis object based on the phantom information and the plurality of pieces of object information per energy level. | 02-06-2014 |
20140050306 | METHOD FOR QUICKLY AND PRECISELY CALIBRATING MEDICAL IMAGING COMPONENT AFTER POSITION CHANGE - A method for quickly and precisely calibrating a medical imaging component after position change, comprising: placing a imaging component at a reference position, calibrating, precisely by a first measuring system, the reference position and obtaining a precise calibration value of the reference position; at the same time, performing, by a second measuring system, a second calibration for the reference position of the imaging component and obtaining a reference calibration value of the reference position; measuring, by the second measuring system, the current position of the imaging component and obtaining a reference calibration value of the current position; obtaining a precise calibration value of the current position via calculation based on the precise calibration value of the reference position, the reference calibration value of the reference position, and the reference calibration value of the current position. | 02-20-2014 |
20140064458 | RADIATION PENETRATION SYSTEM AND CALIBRATION OF THE SAME - Position errors of the flat-panel detector in the axes system of the radiation penetration system relative to a necessitated position which remain, for example, after a coarse setup of the radiation penetration system are balanced and thus the accuracy of the radiation penetration system is brought almost randomly close to the accuracy which would have resulted if the flat-panel detector had been exactly adjusted mechanically subsequently by executing a geometrical correction of the radiation penetration raw image, so that a change of a projection of the penetrated object in the radiation penetration raw image due to the position error is reduced or corrected. | 03-06-2014 |
20140072108 | METHODS AND APPARATUS FOR EXTENDED LOW CONTRAST DETECTABILITY FOR RADIOGRAPHIC IMAGING SYSTEMS - Evaluating dose performance of a radiographic imaging system with respect to image quality using a phantom, a channelized hotelling observer module as a model observer, and a printer, a plaque, or an electronic display includes scanning and producing images for a plurality of sections of the phantom using the radiographic imaging system, wherein the plurality of sections represent a range of patient sizes and doses and wherein the sections of the phantom contain objects of measurable detectability. Also included is analyzing the images to determine detectability results for one or more of the contained objects within the images of the plurality of sections of the phantom, wherein the analyzing includes using a channelized hotelling observer (CHO) module as a model observer; and displaying, via the printer, the plaque, or the electronic display, a continuous detectability performance measurement function using the determined detectability results. | 03-13-2014 |
20140086394 | SYSTEM AND METHOD FOR CORRECTION OF GEOMETRIC DISTORTION OF MULTI-CAMERA FLAT PANEL X-RAY DETECTORS - System and method for correcting geometric distortion in a multi-camera flat panel X-Ray detector. A scintillator converts X-Ray radiation generated by an X-Ray source into detectable radiation. Internal markers are placed at known locations adjacent to the scintillator, inside a casing of the detector. External markers placed at known locations outside the casing, adjacent to a cover of the detector. At least one imaging sensor acquires, during the calibration phase, a partial image depicting the external markers and the internal markers. The location of the external markers and the internal markers on the partial X-Ray image is found. A parallax free transformation for correcting geometric distortion based on differences between relation between physical location of the external markers and location of the external markers on the X-Ray image and relation between physical location of the internal markers and location of internal markers on the partial X-Ray image is calculated. | 03-27-2014 |
20140105369 | CALIBRATION APPARATUS AND METHOD - Provided are a calibration apparatus and method that may be used for setting a magnitude of an electric pulse based on a result obtained by imaging at least one imaging object, and that may be used for mapping and calibrating a photon energy corresponding to an absorption edge of at least one calibration object. | 04-17-2014 |
20140105370 | APPARATUS FOR CALIBRATING PHOTON-COUNTING TYPE OF RADIATION DETECTOR AND METHOD OF CALIBRATING THE SAME - There is provided a calibration apparatus used for a photon counting type of radiation detector. In this apparatus, a radiation condition of a radiation is set such that particles of the radiation (X-rays) which are incident on a plurality of detection modules are piled up over each other at a probability which is equal to or less than a predetermined value. Under the setting of this radiation condition, detection sensitivities for the radiation are made uniform among the plurality of detection modules. Using this uniformed result, the detection sensitivities for the radiation are further made uniform every channel of each of the pixels formed by circuit groups including the plurality of detection modules, discrimination circuits and data calculation circuits and every discrimination circuit in each channel. | 04-17-2014 |
20140119517 | METHODS OF CALIBRATING X-RAY DETECTORS - A method of calibrating a first threshold voltage that is a reference of X-ray detection for each unit cell of a plurality of unit cells of an X-ray detector may comprise detecting an X-ray by using a plurality of second threshold voltages for each of a plurality of X-rays having spectra at different energy levels; determining a correspondence relationship between energies having a maximum intensity in the spectra of X-rays and third threshold voltages at which a maximum number of photons having a same energy intensity are detected; and/or calibrating the first threshold voltage based on the determined correspondence relationship. | 05-01-2014 |
20140133636 | Computed Tomography Perfusion Phantom and Method Use Thereof - A computed tomography perfusion phantom includes a scanned plane configured to align with an imaging plane of a CT device. A sample rod extends through the scan plane and includes a plurality of adjacent cells. The plurality of adjacent cells are each constructed of materials having predetermined CT numbers and the plurality of adjacent cells include cell of a plurality of CT numbers. A drive motor is coupled to the sample rod and the drive motor moves the sample rod through the scan plane. A method of calibrating a CT device with the perfusion phantom includes aligning the scan plane of the perfusion phantom with an imaging plane of the CT device. The drive motor moves the sample rod through the scan plane of the perfusion phantom. A plurality of CT number measurements of the sample rod are acquired through the scanned plane of the perfusion phantom. | 05-15-2014 |
20140133637 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, RADIATION IMAGING SYSTEM, AND STORAGE MEDIUM - A radiation imaging system including an X-ray sensor with a plurality of sensor chips disposed next to each other and an image processing apparatus which performs abnormality determination concerning a white image obtained by irradiating the X-ray sensor with X-rays without any object disposed between the X-ray sensor and an X-ray generator, the system includes: an area acquisition unit configured to acquire information of partial areas of the white image which respectively correspond to the plurality of sensor chips; a distribution acquisition unit configured to acquire distribution information representing variation in pixel value for each of the acquired partial areas; and a determination unit configured to determine, based on the distribution information, whether abnormality is included in the white image. | 05-15-2014 |
20140146950 | EVALUATION AID AND EVALUATION DEVICE - The present invention provides an evaluation aid which can be used as a phantom (imitation lesion) when a digital X-ray dynamic image thereof is taken and then evaluation is carried out through the digital X-ray dynamic image, and especially an evaluation aid which can be used for evaluating image qualities of a digital X-ray dynamic image for X-ray absorption parts having different X-ray absorption ratios, and an evaluation device provided with such an evaluation aid. The evaluation aid of the present invention is adapted to be used for taking a digital X-ray dynamic image thereof through which evaluation is carried out, and contains a fixed plate (plate-like body) including a plurality of regions having different X-ray absorption ratios; a rotating disk (movable body) having a plurality of wires (wire rods), the rotating disk capable of rotating (moving) with respect to the fixed plate so that the plurality of wires traverse X-ray with which the fixed plate is irradiated; and a driving motor (driving portion) which rotates (moves) the rotating disk with respect to the fixed plate. It is preferred that thicknesses and/or constituent materials of the plurality of regions of the fixed plate are different from each other, so that these regions have the different X-ray absorption ratios. | 05-29-2014 |
20140177810 | SYSTEM AND METHODS FOR X-RAY TUBE AGING DETERMINATION AND COMPENSATION - Exemplary embodiments are directed to a system and method for estimating and compensating for anode target filtration in an X-ray tube. Certain embodiments record changes in the photon flux over the life of the tube. By comparing the flux values, filtration resulting from a roughened target surface and target deposition on the tube window may be inferred. A plurality of systems and methods for comparing flux values are provided and the relative merits and complementary effects of each discussed. | 06-26-2014 |
20140185781 | Method for Calibrating a Counting Digital X-Ray Detector, X-Ray System for Performing Such a Method and Method for Acquiring an X-Ray Image - A method for calibrating a counting digital X-ray detector includes performing a threshold value scan in at least one defined X-ray spectrum for irradiating the X-ray detector, which includes a matrix composed of pixel elements, storing count rates of the pixel elements as a function of respective applied threshold values, and from results of a measurement of count rates of the pixel elements, determining or calculating individual correction threshold values for the individual pixel elements. The individual correction threshold values correct a threshold value that is to be applied to the pixel elements for the defined X-ray spectrum such that threshold value noise is reduced. | 07-03-2014 |
20140211925 | GEOMETRY CALIBRATION ALGORITHM FOR LARGE FLAT MODULE DETECTOR CT SCANNER - A method for geometric calibration of a CT scanner, including, for each row of at least one row of detector cells, establishing a complete geometric description of the CT scanner, including at least one unknown geometric parameter, establishing a description of a forward projection function using the complete geometric description, acquiring actual projection coordinates of a calibration phantom placed in a scanning field of view (SFOV) on a current row of detector cells and corresponding to a plurality of angles, acquiring calculated projection coordinates of the calibration phantom on the current row of detector cells and corresponding to the plurality of angles using the description of the forward projection function, and acquiring a calibrated value for the at least one unknown geometric parameter by evaluating the at least one unknown geometric parameter based on the acquired actual projection coordinates and calculated projection coordinates via a nonlinear least square fitting algorithm. | 07-31-2014 |
20140233708 | MEDICAL APPARATUS AND X-RAY HIGH VOLTAGE APPARATUS - A medical apparatus includes a power device, a temperature sensor, a conversion processing unit and a prediction time period calculation unit. The temperature sensor detects temperature data. The conversion processing unit refers to temperature data obtained by the temperature sensor in a table in which at least one of temperature data for inside a case covering the power device and temperature data for a wire bonded to the power device is associated with data of actually measured temperatures, and obtains at least one of the temperature data for inside the case and the temperature data for the wire. The prediction time period calculation unit calculates a prediction time period until a failure of the power device based on the obtained temperature data. | 08-21-2014 |
20140254770 | X-Ray Computed Tomography Device Calibration and Verification Apparatus - An apparatus for calibrating an x-ray computed tomography device has a plurality of objects formed from a material that is visible to x-rays, and a base at least in part fixedly supporting the plurality of objects so that each of the plurality of objects contacts at least one of the other objects. Each one of the plurality of objects: 1) is configured to receive x-rays without changing shape, 2) has substantially the same shape and size as the other objects, 3) has an attenuation value to x-rays (“object attenuation value”), and 4) is symmetrically shaped relative to its center point. Like the objects, the base also has an attenuation value to x-rays (the “base attenuation value”). The object attenuation value is greater than the base attenuation . Each of the plurality of objects is kinematically locked in place on the base. | 09-11-2014 |
20140314211 | PILEUP CORRECTION METHOD FOR A PHOTON-COUNTING DETECTOR - A method and apparatus for determining a parameter vector that includes a plurality of parameters of a detector pileup model of a photon-counting detector, the detector pileup model being used for pileup correction for a spectral computed-tomography scanner. The method includes setting values of the parameters, the parameters including a dead time parameter and individual probabilities of different pileup events, the probabilities including a probability of single photon events, a probability of double quasi-coincident photon events, and a probability of at least three quasi-coincident photon events. The method include determining, using (1) a detector response model, (2) an incident spectrum, and (3) the set values of the parameter vector, a plurality of component spectra, each component spectrum corresponding to one of the individual probabilities of the different pileup events, and summing the plurality of component spectra to generate an output spectrum. | 10-23-2014 |
20140334608 | Medical Treatment or Examination Device - A medical treatment or examination device includes at least one device component that may move relative to at least one other device component via a drive device. A measuring device is provided for detecting a load acting on the movable device component. The measuring device includes a support that bends due to the load. The support, at least in a bending region, has a section producing a magnetic field. The measuring device also includes at least one coil that is assigned to the section and in which the magnetic field undergoing a change as a result of bending due to a load induces an induction current that serves as measurement signal describing the load. | 11-13-2014 |
20140348305 | TEST BODY AND METHOD FOR CHECKING THE TRANSMISSION PROPERTIES OF VOLUME TOMOGRAPHS - The invention relates to a test body for checking the transmission properties of volume tomographs, in particular radiological tomographs, which comprises several plates ( | 11-27-2014 |
20140348306 | MOBILE X-RAY UNIT - One embodiment of the present disclosure is directed to a mobile X-ray unit. The mobile X-ray unit may include an X-ray applicator for emitting an X-ray beam for irradiating an object. The mobile X-ray unit may further include a phantom-based dosimetry system configured to perform a dosimetry check of the X-ray beam. The phantom-based dosimetry system may include two sets of dose meters, each set being positioned on a surface at a distinct depth. The mobile X-ray unit may also include a dosimetry control unit configured to receive measurements from the two sets of dose meters and determine whether the dosimetry check is passed based on the measurements. | 11-27-2014 |
20140376701 | QUANTITATIVE PHANTOMLESS CALIBRATION OF COMPUTED TOMOGRAPHY SCANS - An apparatus, method, and computer program product for calibrating a CT scan without the use of an external calibration phantom, to enable quantitative assessment of internal body tissues and organs and additionally for any application that would benefit from a calibration of the scan attenuation data, such as viewing CT images in a consistent fashion. Embodiments are described with applications to quantitative assessment of bone density in the spine and hip, mineral content in blood vessels, hepatic-fat content in the liver, and gray-to-white matter ratio in the brain. The primary advantages of the method are that it does not require the use of an external calibration phantom, it is robust across different CT machines and scanner settings, and it is also highly precise, lending itself to a high degree of automation. | 12-25-2014 |
20150016594 | X-RAY DIFFRACTION-BASED DEFECTIVE PIXEL CORRECTION METHOD USING AN ACTIVE PIXEL ARRAY SENSOR - A method for correcting erroneous intensity measurements caused by defective pixels of the detector for a single-crystal X-ray diffraction system uses collected diffraction images and a defective pixel list to modify three-dimensional reflection profiles by replacing profile elements affected by the defective pixels with corresponding profile elements from a model profile. Reflection positions on the detector are predicted using an orientation matrix for the crystal and a three-dimensional observed profile is constructed for each reflection. A model profile is constructed using normalized profile data from multiple reflection profiles. The observed profiles are compared with the defective pixel list to determine which profile elements are affected by defective pixels, and those elements are replaced by corresponding elements from the model profile. If the replaced elements represent more than a predetermined percentage of the overall reflection intensity, the data for that reflection is omitted from an overall dataset for the crystal. | 01-15-2015 |
20150036806 | METHOD FOR REAL-TIME QUALITY ASSURANCE ASSESSMENT OF GANTRY ROTATION AND COLLIMATOR ROTATION IN RADIATION THERAPY - A method and device for real-time mechanical and dosimetric quality assurance measurements in radiation therapy provides a unified measurement of mechanical motion and radiation components of the machine. The device includes an imaging surface for receiving multiple energy sources. The imaging surface has an imaging plane positioned on a same plane as an isocenter of a medical accelerator. A camera measures and records data related to the multiple energy sources. A mirror system can be used to direct the multiple energy sources to the camera for further processing. However, in some instances the mirror system may not be necessary. The device can also include computer control in order to automate the movement of the device and/or automation of the QA protocol. The device can also be used in executing a method for assessing gantry and collimator rotation. | 02-05-2015 |
20150055761 | TEMPERATURE COMPENSATION FOR THIN FILM TRANSISTORS IN DIGITAL X-RAY DETECTORS - A digital radiographic detector uses predetermined calibration information corresponding to a first operating temperature of the detector. The calibration data is accessible by the detector to compensate a radiographic image captured by the detector at a second operating temperature different than the first operating temperature. The operating temperature of the detector is monitored at approximately the time at which the radiographic image is captured at the second temperature. | 02-26-2015 |
20150071413 | METHOD OF AGING X-RAY GENERATOR HAVING CARBON NANOTUBE ELECTRON EMITTER - Provided are methods of aging an x-ray generator having carbon nanotube electron emitters. The method of aging an x-ray generator that includes a cathode, a gate electrode, and an anode, includes applying a desired, or alternatively predetermined anode voltage to the anode, and applying a direct current pulse voltage to the gate electrodes to emit electrons from electron emitters. The method further includes maintaining an anode current formed by electrons generated from the electron emitters constant. | 03-12-2015 |
20150071414 | RADIOGRAPHIC IMAGING SYSTEM AND SYSTEM OPERATION METHOD - An X-ray imaging system includes a plurality of electronic cassettes having FPDs. One of the plural electronic cassettes for use in imaging is selected by input operation. Control is performed in a first mode operation being normal for the electronic cassette selected in the selecting step. Control is performed in a second mode operation being auxiliary of which driving power is lower than in the first mode operation for one of the electronic cassettes in an unselected state in the selecting step. Assuming that irradiation of the radiation is detected in the second mode operation, error information is displayed in relation to selecting the electronic cassette in the selecting step. For example, the first and second mode operations are pixel reset in which charge stored in pixels are swept in an FPD. | 03-12-2015 |
20150085993 | DOSIMETRIC END-TO-END VERIFICATION DEVICES, SYSTEMS, AND METHODS - Dosimetrical end-to-end quality assurance devices, systems, and methods for radiation devices using X-ray imaging, optical surface imaging, and electromagnetic navigational systems to position the quality assurance device either absolute or relative in space. | 03-26-2015 |
20150117618 | METHOD AND APPARATUS FOR CORRECTING FOCUS OF CT DEVICE - A method and apparatus for correcting a focus of a CT device are provided. The method includes: calculating a total focus shift according to scanning data; and correcting, when the CT device is running, a deflection of an electron beam emitted from a ray source of the CT device, based on the total focus shift. The device includes: a shift calculation module, configured to calculate a total focus shift according to scanning data; and a shift correction module, configured to correct, when the CT device is running, a deflection of an electron beam emitted from a ray source of the CT device, based on the total focus shift. | 04-30-2015 |
20150305705 | PHANTOM AND METHOD FOR IMAGE QUALITY ASSESSMENT OF A DIGITAL BREAST TOMOSYNTHESIS SYSTEM - A phantom for image quality assessment of digital breast tomosynthesis apparatus includes at least one set of beads arranged as a first ramp and as a second ramp in respective proximate parallel vertical planes in a reverse staircase pattern along a vertical direction with a final bead of the first ramp and an initial bead of the second ramp being located at substantially the same intermediate height within the phantom. The beads and additional test objects may be positioned in non-overlapping locations within the phantom to facilitate determination of multiple image quality parameters with a single scanning sequence of the phantom. | 10-29-2015 |
20150316665 | Gamma-Ray Spectrometry - A calibration source for a gamma-ray spectrometer is provided. The calibration source comprises a scintillator body having a cavity in which a radioactive material is received. The scintillator body may be generally cuboid and the cavity may be formed by a hole drilled into the scintillator body. The radioactive material comprises a radioactive isotope having a decay transition associated with emission of a radiation particle and a gamma-ray having a known energy e.g. Na-22. A photodetector, for example a silicon photomultiplier, is optically coupled to the scintillator body and arranged to detect scintillation photons generated when radiation particles emitted from the radioactive material interact with the surrounding scintillator bod. A gating circuit is arranged to receive detection signals from the photodetector and to generate corresponding gating signals for a data acquisition circuit of an associated gamma-ray spectrometer to indicate that gamma-ray detections in the gamma-ray spectrometer occurring within a time window defined by the gating signal are associated with a decay transition in the radioactive isotope. Thus a calibration source is provided based around a simple scintillator body design. Furthermore, the radioactive material may be introduced into the scintillator body in a separate step after manufacture of the scintillator body, thereby reducing the risk of radioactive contamination during manufacture. | 11-05-2015 |
20150320366 | X-RAY CT APPARATUS - According to one embodiment, an X-ray CT apparatus includes a rotating body configured to house an X-ray tube which irradiates X-rays on an object; at least one weight configured to be housed in the rotating body and to adjust balance of the rotating body; a sensor configured to detect fluctuation amount in a front-back direction approximately orthogonal to a rotating surface of the rotating body; processing circuitry configured to determine moving amount of the weight based on the fluctuation amount in a front-back direction detected by the sensor; and at least one weight moving mechanism configured to be housed in the rotating body and to move a position of the weight based on the moving amount determined by the determination unit. | 11-12-2015 |
20150327834 | EQUIVALENT PHANTOM AND METHOD OF EVALUATING QUALITY OF X-RAY TALBOT IMAGING APPARATUS WITH THE SAME - An equivalent phantom is used for an X-ray Talbot imaging apparatus which includes an X-ray source, a plurality of gratings and an X-ray detector. The apparatus captures at least a Moire image from which a differential phase image of an object is generated. The equivalent phantom includes a first substance having a first refractive index and a second substance having a second refractive index. A ratio of the first refractive index to the second refractive index is equal to a ratio of a refractive index of a soft tissue to a refractive index of a surrounding tissue. At least a part of a shape of one of the first and second substances is equal to a shape of a corresponding portion of the soft tissue. | 11-19-2015 |
20150342559 | ARTEFACT FOR EVALUATING THE PERFORMANCE OF AN X-RAY COMPUTED TOMOGRAPHY SYSTEM - The invention provides a kit for assembly of an artefact for 100 evaluating performance purposes of an X-ray CT metrology system. The artefact comprises one or more interconnectable, stackable support plates, onto which a plurality of spherical bodies is mounted. The lightweight stacked support plate structure allows for a plurality of different configurations, and can be disassembled for enhanced storage, and safe and compact | 12-03-2015 |
20150343240 | TEST OBJECT FOR THE CORRECTION OF MOTION ARTEFACTS OF A PORTAL IMAGER EQUIPPING AN EXTERNAL RADIATION THERAPY TREATMENT DEVICE WHEN THE EXTERNAL RADIATION THERAPY TREATMENT DEVICE IS MOVING - Disclosed is a test object for an external radiation therapy treatment device, the treatment device including a rotating gantry carrying at one end a radiation head and, at the other end, a portal imager, the test object including a radiologically translucent plate within which at least one radiopaque member is embedded, the at least one radiopaque member forming a geometrical pattern having at least two points and the center of the geometrical pattern corresponding to the center of the radiologically translucent plate, and a fastening element to attach the test object on the radiation head. | 12-03-2015 |
20150355115 | Calibrating an X-Ray Based Multiphase Flow Meter - A device for determining a mass flow rate of a multiphase fluid within a pipe includes an X-ray source for providing X-rays at at least 2 different wavelengths and a corresponding X-ray detector arranged such that a detection section of the pipe is placed within the optical path of the X-rays between the X-ray source and the X-ray detector. A calibration chamber is located parallel to the detection section within the optical path of the X-rays. | 12-10-2015 |
20150374327 | THREE-DIMENSIONAL X-RAY CT CALIBRATION AND VERIFICATION APPARATUS AND METHOD - An apparatus for calibrating an x-ray computed tomography device has a plurality of objects formed from a material that is visible to x-rays. The plurality of objects are configured to receive x-rays without changing shape, and have substantially the same shape. The objects each have an object attenuation value to x-rays and a center point such that they are symmetrically shaped relative to their respective center points. The apparatus also has a base at least in part fixedly supporting the plurality of objects so that each of the plurality of objects contacts at least one of the other objects. Like other physical objects, such as the objects, the base has a base attenuation value to x-rays, and that value is greater than the base attenuation value. The center points of the plurality of objects together form a three-dimensional volume. | 12-31-2015 |
20160015356 | Brain Tissue Equivalent Material And Phantom Device Comprising The Same - Compositions, including composition for use in radiographic calibration and quality assurance include glass micro bubbles, epoxy, CaCo | 01-21-2016 |
20160015357 | GAIN CALIBRATION AND CORRECTION IN RADIATION SYSTEM - Among other things, one or more techniques and/or systems for calibration of a radiation system to compute a gain correction(s) are provided. A calibration procedure is performed during which a portion of the detector array is shadowed by an object, causing the detector array to be non-uniformly exposed to radiation. A portion of a projection generated from the calibration procedure and indicative of radiation that did not traverse the object is separated from a portion of the projection indicative of radiation that did traverse the object, and a gain correction(s) is computed from the portion of the projection indicative of radiation that did not traverse the object (e.g., and is thus indicative of radiation that merely traversed air). | 01-21-2016 |
20160038116 | MARKERS, PHANTOMS AND ASSOCIATED METHODS FOR CALIBRATING IMAGING SYSTEMS - Embodiments of the present invention provide markers, phantoms, and associated methods of calibration which are suitable for use in both medical resonance imaging and radiographic imaging systems. A marker includes a first component having a first hydrogen proton density and a first mass density; and a second component having a second hydrogen proton density different than the first hydrogen proton density, and a second mass density different than the first mass density. The first and second components are non-magnetic. | 02-11-2016 |
20160074002 | ANATOMICAL IMAGING SYSTEM WITH IMPROVED DETECTOR CALIBRATION PROCESS - A method for calibrating detectors in a CT scanner, wherein the new calibration process uses a combination of slab-based and water-based calibrations. By combining both calibrations, the complexity of each procedure can be reduced which will reduce restrictions on the quality of detectors used in the scanner. The slabs can be made out of commercially available material such as acrylic, and they will require no special treatment. Combining both calibrations also reduces the number of water phantoms needed for the calibration and the complexity of the calibration algorithm. Furthermore, the slabs can be shaped based on the scanner geometry so as to optimize the slab-based calibration step. | 03-17-2016 |
20160089106 | THERMOPLASTIC 3-D PHANTOM - There is provided a radiographic three-dimensional phantom for inter alia mimicking specific anatomical parts in a computerized tomography scan. Methods are provided for a variety of purposes including detecting a difference between a measured optical deformation of a radiographic three-dimensional phantom pair and a theoretical deformation of the radiographic three-dimensional phantom pair. These three-dimensional phantom can be divided into a plurality of portions, and non-radiopaque markers can be added to the portions. The portions of the three-dimensional phantom can be re-assembled, and images of the three-dimensional phantom can be generated and compared. | 03-31-2016 |
20160095569 | QUALITY CONTROL PHANTOM - A quality control phantom comprises a container and a frame to secure quality control accessories in position within the container during radiologic exposure testing. | 04-07-2016 |
20160113617 | CALIBRATION OF IMAGERS WITH DYNAMIC BEAM SHAPERS - Calibration methods and related calibration controllers (CC) for calibrating imaging apparatuses ( | 04-28-2016 |
20160128658 | METHOD AND SYSTEM FOR DETECTING A PORTABLE DIRECT RADIOGRAPHIC PANEL IN A MULTI-STAND RADIOGRAPHIC EXPOSURE ROOM - A method for detecting the presence of a portable direct radiographic panel in a medical imaging system including radiographic exposure stands, each stand and each panel being provided with an NFC tag, includes positioning a panel in an exposure stand such that the NFC tags of the panel and the stand are in each other's operating range, detecting the presence of the panel in the exposure stand by a-communication between the NFC tags, and communicating the presence of the panel in the exposure stand to the medical imaging system. | 05-12-2016 |
20160143611 | METHOD OF TESTING WATERPROOF PERFORMANCE OF RADIOLOGICAL IMAGING APPARATUS, AND RADIOLOGICAL IMAGING APPARATUS - A method of testing waterproof performance of a radiological imaging apparatus including: a sensor panel including a plurality of radiation detecting elements two-dimensionally arranged; a housing containing the sensor panel; and an air pressure measuring unit configured to measure an air pressure in the housing having a vent hole allowing the air to flow into and out of the housing, includes: a load application step of continuing to apply a load to the housing; an air pressure measurement step of measuring the air pressure in the housing with the air pressure measuring unit, the air pressure changing while the load is being applied to the housing; and a waterproof performance determination step of determining whether the waterproof performance of the radiological imaging apparatus is normal based on a pattern of change in the measured air pressure in the housing. | 05-26-2016 |
20160178795 | METHOD FOR MEASURING X-RAY ENERGY OF AN ACCELERATOR IN AN INSPECTION SYSTEM | 06-23-2016 |
20160183904 | GENERATING MATERIAL HARDENING EFFECT DATA - A method for generating material hardening effect data is provided. Actual X-ray attenuation values of a universal phantom corresponding to different angles at each of channels may be obtained. Equivalent filtration thicknesses corresponding to each of the channels may be determined according to theoretical X-ray attenuation values and the actual X-ray attenuation values corresponding to different angles at each of the channels. Hardening effect data corresponding to a material may be generated according to a predetermined length of the material, a number of sampling points and the equivalent filtration thicknesses corresponding to each of the channels. | 06-30-2016 |
20160183905 | OPTIMIZING CT SCANNING PARAMETER - A method for optimizing CT scanning parameter is disclosed. A target group may be generated from a plurality of reference information samples. Each of the reference information samples may include subject information, information indicating a scanning protocol, one or more scanning parameter values and information indicating reconstructed image quality; the target group can consist of one or more reference information samples with the same subject information and the same scanning protocol. A scanning parameter optimization may be performed according to reconstructed image qualities and scanning parameter values of reference information samples in the target group, so as to acquire a target scanning parameter value of the target group. And according to the target scanning parameter value, a reference X-ray irradiation dose corresponding to the scanning protocol and the subject information of the target group may be determined. | 06-30-2016 |
20160253827 | METHOD FOR DETERMINING THE DANGER ZONE BETWEEN A TEST OBJECT AND AN X-RAY INSPECTION SYSTEM | 09-01-2016 |
20160377748 | X-RAY DATA PROCESSING APPARATUS AND METHOD AND PROGRAM THEREFOR - Provided are an X-ray data processing apparatus and a method and a program therefor which can eliminate the influence of the phenomenon that the statistical variation of a count value after distribution is estimated differently from that at another position and can prevent the influence of correction from remaining. An X-ray data processing apparatus | 12-29-2016 |
20160377749 | X-RAY DATA PROCESSING APPARATUS AND METHOD AND PROGRAM FOR THE SAME - The X-ray data processing apparatus to estimate a true value from an X-ray count value detected by the pixel array X-ray detector of a photon counting system includes a management unit | 12-29-2016 |
20170231596 | METHOD FOR ASCERTAINING A TIME FOR A CALIBRATION, X-RAY DEVICE AND COMPUTER PROGRAM | 08-17-2017 |
20190146106 | GEOMETRIC CALIBRATION OF X-RAY IMAGING SYSTEMS | 05-16-2019 |
20220139262 | Multimodality Anthropomorhic Phantom Apparatus - A multimodality phantom apparatus includes a housing and a system of materials disposed within the housing. The system of material includes a first amount of abase material, a second amount of glass microspheres, a third amount of CaCO | 05-05-2022 |