Patent application number | Description | Published |
20080237479 | RADIATION IMAGE DETECTION METHOD AND APPARATUS - A radiation image detection method including the steps of: detecting from a radiation image detector including multitudes of pixels disposed two-dimensionally, each having a TFT switch, an analog image signal of each pixel flowing out through each data line by sequentially switching ON the TFT switches connected to each scanning line on a scanning line-by-scanning line basis; detecting an analog leak level flowing out through each data line with the TFT switches connected to each of the scanning lines being switched OFF each time before switching ON the TFT switches on a scanning line-by-scanning line basis when converting the detected analog image signal to a digital image signal and outputting; and correcting the analog image signal before being converted to the digital image signal based on the leak level. | 10-02-2008 |
20080237508 | RADIATION IMAGE DETECTION APPARATUS, RESIDUAL CHARGE AMOUNT ESTIMATION METHOD FOR USE WITH THE APPARATUS AND PROGRAM THEREFOR - A residual charge amount estimation method including the steps of: providing a radiation image detector including pixels, scanning lines, and data lines, each pixel having a collection electrode, a capacitor, and a TFT switch; detecting a leak current flowing out through each data line with the TFT switches being switched OFF; reading out an image signal flowing out through each data line by sequentially switching ON the TFT switches connected to each scanning line on a scanning line-by-scanning line basis; calculating an average leak current per unit saturated pixel from the leak current detected from at least one of the data lines on which a saturated pixel having a saturated value of the image signal is found and the number of saturated pixels; and estimating the amount of residual charges remaining in the unit saturated pixel based on the average leak current. | 10-02-2008 |
20090039277 | RADIATION IMAGE DETECTOR - A radiation image detector includes a radiation image detector main-body having radiation detection devices for detecting radiation that are at least linearly arranged, a switching output unit having a multiplicity of switch devices, and a dummy circuit unit connected to a switch device that is switched last among the multiplicity of switch devices. The switching output unit sequentially switches columns of the radiation detection devices by the switch devices and sequentially outputs signals detected by the radiation detection devices line by line. Further, after signals are output from the radiation detection devices in a predetermined line, the dummy circuit unit outputs a signal having a magnitude that does not substantially influence signals that will be read out from the radiation detection devices in the following line of the predetermined line. | 02-12-2009 |
20100252740 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING METHOD - Placement of a marker is performed efficiently, when performing a plurality of radiation imaging operations of a subject with different imaging angles. An operator inputs a region of interest within a subject on a bed, via an operating section. The region of interest and a peripheral region thereof are set as an irradiation range, and the marker is placed in the peripheral region. A radiation source control section causes a radiation source to emit radiation toward the subject within the set irradiation range. Radiation which passes through the subject is obtained by a radiation image detector as a radiation image. | 10-07-2010 |
20100322376 | RADIATION IMAGING APPARATUS AND METHOD - A plurality of radiation images of an object are acquired by iterating the steps of: beginning driving of a rotation driving unit at the time at which a breathing signal having been detected by a breathing sensor has come into a predetermined state, performing a radiation imaging operation with a set of a radiation source and a radiation detector at the time, at which the heart has come into a predetermined state, in accordance with a heartbeat signal having been detected by a heartbeat sensor within a rotation driving period, during which the rotation driving unit performs the rotation driving, and ceasing the rotation driving of the rotation driving unit at the time at which the breathing of the object has come into a state other than the predetermined state. | 12-23-2010 |
20110168906 | RADIATION IMAGE DETECTOR - A radiation image detector includes a radiation-image-detector main body and a vacuum container. The radiation-image-detector main body generates charges by irradiation with an electromagnetic wave for recording that carries a radiation image and records the radiation image by accumulating the charges. The vacuum container is sealed to store the radiation-image-detector main body in a vacuum. | 07-14-2011 |
20120045110 | METHOD OF ENCODING A RADIOGRAPHIC IMAGE SIGNAL, METHOD OF DECODING A RADIOGRAPHIC IMAGE SIGNAL, RADIOGRAPHIC IMAGE DETECTION DEVICE AND RADIOGRAPHIC IMAGE SIGNAL GENERATION DEVICE - From a radiation detecting unit for detecting a radiographic image of a subject by receiving radiation transmitted through the subject, a radiographic image signal representing the radiographic image is read out, and information about an imaging operation carried out to obtain the radiographic image of the subject is obtained. The radiographic image signal is encoded with using key information based on the obtained information about the imaging operation to generate an encoded radiographic image signal, and the encoded radiographic image signal is outputted as a radio communication signal. | 02-23-2012 |
20120126129 | RADIOGRAPHIC IMAGE CAPTURING APPARATUS - A radiographic image capturing apparatus includes a photodetector substrate, a scintillator, a switching filter, and a resetting light source, which are arranged successively in this order. If the switching filter is made permeable to resetting light from the resetting light source, the switching filter allows resetting light to be applied to the photodetector substrate through the scintillator, whereas, if the switching filter is made impermeable to the resetting light, the switching filter reflects at least a fluorescence, which is converted from radiation by the scintillator, toward the photodetector substrate. | 05-24-2012 |
20120132820 | RADIOGRAPHIC IMAGE DETECTING APPARATUS AND RADIOGRAPHIC IMAGE CAPTURING SYSTEM - A radiographic image detecting apparatus and a radiographic image capturing system are provided. The radiographic image detecting apparatus includes a plurality of photoelectric conversion elements for generating electric charge by emission of radiation, a bias line through which a bias voltage is supplied to the photoelectric conversion elements, a power supply for applying the bias voltage to the photoelectric conversion elements through the bias line, a current detector for detecting a bias current flowing through the bias line, and a reading circuit including an amplifying circuit. The current detector includes a current mirror circuit connected between the bias line connected to the photoelectric conversion elements and the power supply. | 05-31-2012 |
20120132824 | RADIOGRAPHIC IMAGE DETECTING APPARATUS AND RADIOGRAPHIC IMAGE CAPTURING SYSTEM - A radiographic image detecting apparatus and a radiographic image capturing system are provided. The radiographic image detecting apparatus includes photoelectric conversion elements for generating electric charge by emission of radiation, a bias line through which a bias voltage is supplied to the photoelectric conversion elements, a power supply for applying the bias voltage to the photoelectric conversion elements through the bias line, a current detector for detecting a bias current flowing through the bias line based on a voltage drop across a resistor inserted in the bias line, a first amplifying circuit, a second amplifying circuit connected to an output of the first amplifying circuit, and a controller for correcting the electric signal by increasing a gain of the second amplifying circuit depending on decrease in a sensitivity of the photoelectric conversion element, the decrease being caused by the voltage drop. | 05-31-2012 |
20120140886 | RADIOGRAPHIC PHASE-CONTRAST IMAGING METHOD AND APPARATUS - A radiographic phase-contrast imaging apparatus includes: a first grating having a periodically-arranged grating structure and allowing radiation emitted from a radiation source to pass therethrough to form a first periodic-pattern image; a second grating having a periodically-arranged grating structure including areas transmitting the first periodic-pattern image and areas shielding the first periodic-pattern image to form a second periodic-pattern image; a radiographic image detector to detect the second periodic-pattern image; a moving mechanism to effect relative movement of the radiographic image detector toward and away from the radiation source, thereby achieving magnification imaging; and an acceptable magnification factor calculation unit to calculate an acceptable magnification factor based on size information of the radiographic image detector and size information of at least one of the first and second gratings, the acceptable magnification factor ensuring the radiation transmitted through the first and second gratings to be received within the radiographic image detector. | 06-07-2012 |
20120153181 | RADIATION IMAGE CAPTURING APPARATUS AND RADIATION IMAGE OBTAINING METHOD - A radiation image capturing apparatus includes: a first grid which includes grid structures disposed at intervals and forms a first periodic pattern image by passing radiation emitted from a radiation source; a second grid provided with grid structures disposed at intervals and forms a second periodic pattern image by receiving the first periodic pattern image; a radiation image detector that detects the second periodic pattern image formed by the second grid; and a detector positioning mechanism that adjusts a position of the radiation image detector in an in-plane direction of a detection plane of the detector such that radiation transmitted through the first and second grids falls within the radiation image detector. | 06-21-2012 |
20120153182 | RADIATION IMAGE OBTAINING METHOD AND RADIATION IMAGE CAPTURING APPARATUS - A radiation image capturing apparatus for capturing a plurality of radiation images by translating a second grid with respect to a first grid and transmitting the plurality of radiation images includes a storage unit for storing a plurality of radiation image signals captured by translating the second grid with respect to the first grid, an association unit for associating the plurality of radiation image signals stored in the storage unit, and a communication unit for transmitting one set of the radiation image signals associated by the association unit at a time. | 06-21-2012 |
20120163537 | RADIOGRAPHIC IMAGE OBTAINMENT METHOD AND RADIOGRAPHIC APPARATUS - In a radiographic apparatus, a radiation image detector or first and second gratings are structured in such a manner to be attachable to the radiographic apparatus and detachable therefrom. The radiographic apparatus includes a cassette attachment/detachment detection unit that detects attachment and detachment of the radiation image detector, or a grid attachment/detachment detection unit that detects attachment and detachment of the first and second gratings. The apparatus further includes a preliminary irradiation control unit that controls a radiation source so that preliminary irradiation for detecting a relative positional deviation between the first and second gratings and the radiation image detector is performed when attachment or detachment of the radiation image detector, or the first and second gratings has been detected. | 06-28-2012 |
20130082184 | RADIOGRAPHIC IMAGING DEVICE - The present invention provides a radiographic imaging device that may image radiographic images with high sharpness while suppressing a drop in sensitivity. Namely, a radiation detector, in which a scintillator that generates light due to irradiation of radiation and a TFT substrate on which plural sensor portions configured including an organic photoelectric conversion material that generates electric charges by receiving light are disposed are sequentially layered, is positioned in such a way that radiation that has passed through a subject is made incident from the TFT substrate side. | 04-04-2013 |
20130126743 | RADIATION DETECTOR - A radiation detector includes a scintillator layer, a first photoelectric conversion layer, a second photoelectric conversion layer, and one board or two boards. The scintillator layer, the first photoelectric conversion layer, the second photoelectric conversion layer, and the one board or two boards are layered. The first photoelectric conversion layer is constituted with one of a first organic material and an inorganic material with a wider radiation absorption wavelength range than the first organic material. The first photoelectric conversion layer absorbs at least light of a first wavelength and converts the light to charges. The second photoelectric conversion layer is constituted with a second organic material that is different from the first organic material. The second photoelectric conversion layer absorbs more of light of a second wavelength than of light of the first wavelength and converts the light to charges. | 05-23-2013 |
20130126850 | RADIATION DETECTOR AND RADIATION DETECTOR MANUFACTURING METHOD - A radiation detector that includes a first scintillator layer, an organic photoelectric conversion layer and a substrate is provided. The first scintillator layer, the organic photoelectric conversion layer and the substrate are layered along a radiation incident direction. The first scintillator layer contains a blend of a first phosphor material that is mainly sensitive to low energy radiation in incident radiation and converts the radiation into light of a first wavelength, and a second phosphor material that is more sensitive to high energy than low energy radiation in the radiation and converts the radiation into light of a second wavelength different from the first wavelength. The organic photoelectric conversion layer is configured by disposing a plurality of first light detection sensors and a plurality of second light detection sensors in the same plane. | 05-23-2013 |
20130136234 | RADIOGRAPHIC IMAGE DETECTOR AND CONTROLLING METHOD THEREFOR - A flat panel detector has pixels for obtaining image signals and detective pixels for detecting the amount of incident x-rays. A signal processing circuit is of a pipeline-type, wherein first and second buffer memories are connected to the output of an A/D converter. In a dose detecting operation, the signal processing circuit repeats primary cycles alternately with secondary cycles of a shorter length than the primary cycles. In the primary cycle, a dose detection signal based on electric charges from the detective pixels is input in the first buffer memory and, simultaneously, a dummy signal is output from the second buffer memory. In secondary cycle, the dose detection signal is output from the first buffer memory and, simultaneously, a second dummy signal is input in the second buffer memory. On the basis of the dose detection signals, a start-of-radiation detector detects the start of x-ray radiation. | 05-30-2013 |
20130140464 | RADIATION DETECTION PANEL - A radiation detection panel includes a single light emitting section, a first detection section and a second detection section. The single light emitting section absorbs radiation that has been transmitted through an imaging subject and that emits light. The first detection section detects light emitted from the light emitting section as an image. The second detection section that is formed from an organic photoelectric conversion material and that detects light emitted from the light emitting section. The light emitting section, the first detection section and the second detection section are stacked in layers along a radiation incident direction. | 06-06-2013 |
20130163716 | RADIOGRAPHIC IMAGE DETECTOR, RADIOGRAPHIC IMAGING APPARATUS, RADIOGRAPHIC IMAGING SYSTEM - The present invention provides a radiographic image detector that may maintain even resolution in 6 directions before and after 3-pixel binning process or 4-pixel binning process. A radiation detector is disposed with plural pixels that have hexagonal shaped pixel regions, arrayed in a honeycomb pattern. Scan lines connected to TFT switches in each of the pixels are disposed one for each of the pixel rows. Grouped scan lines are also disposed one for each of the pixel rows for reading and combining 3 pixels or 4 pixels worth of charges at the same timing for plural pixel groups, each configured from 3 pixels or 4 pixels in a radiation detection element. ON signals are simultaneously sent by the grouped scanned lines to the TFT switches to perform 3-pixel binning or 4-pixel binning. | 06-27-2013 |
20130228694 | RADIOGRAPHIC IMAGING DEVICE - A radiographic imaging device that may detect irradiation states of radiation is provided. Pixels for radiation detection that are provided in a radiation detector of an electronic cassette are configured with characteristics thereof being alterable. The characteristics are set in accordance with the imaging conditions of a radiation image by a cassette control section of the electronic cassette. | 09-05-2013 |
20140061496 | RADIOGRAPHIC IMAGING DEVICE AND COMPUTER READABLE MEDIUM - There is provided a radiographic imaging device including: a radiation detector including plural radiographic image acquisition pixels that are arranged in a matrix in an imaging region for capturing a radiographic image and that acquire image information representing the radiographic image by converting applied radiation into electric charges and storing the electric charges and plural radiation detection pixels that are arranged in the imaging region, that have mutually different characteristics, and that detect the applied radiation by converting the applied radiation into electric charges and storing the electric charges; and a detecting unit that uses the radiation detection pixels selectively according to the characteristics to detect a state of application of the radiation. | 03-06-2014 |
20140072103 | RADIOGRAPHIC IMAGING APPARATUS AND CONTROL METHOD FOR THE SAME - An X-ray imaging apparatus includes an FPD and short-circuited pixels. The FPD has pixels arranged in arrays for detecting an X-ray image. The short-circuited pixels detect a radiation dose of X-rays in the FPD. The X-ray imaging apparatus is changed over between first and second operating modes. The first operating mode is selected in case of combining with an X-ray generating apparatus with communication compatibility, and performs an exposure control for controlling a total radiation dose according to a detection signal from the short-circuited pixels. The second operating mode is selected in case of combining with an X-ray generating apparatus with communication incompatibility, and performs control of start synchronization for synchronizing operation of the FPD with the emission start of X-rays according to a detection signal from the short-circuited pixels. Thus, control of the X-ray imaging apparatus is changed over appropriately. | 03-13-2014 |
20140086391 | RADIOGRAPHIC IMAGE DETECTING DEVICE AND CONTROL METHOD THEREOF - An X-ray image detecting device has an FPD having a matrix of pixels each for accumulating signal charge in accordance with an X-ray irradiation amount. An imaging area of the FPD is partitioned into a plurality of divided sections A to I. Each of the divided sections A to I has a short pixel for detecting X-ray irradiation. In a synchronization control for controlling the FPD in synchronization with detection of a start of X-ray emission from an X-ray source, a control unit for controlling the X-ray image detecting device uses all the divided sections A to I. In an automatic exposure control for stopping the X-ray emission from the X-ray source by detecting a total X-ray irradiation amount, the control unit uses part of the divided sections, e.g. the short pixels of the divided sections that are judged to be opposed to an object in the synchronization control. | 03-27-2014 |
20140103220 | RADIOGRAPHIC IMAGING APPARATUS - An electronic cassette includes a first radiation detector for still imaging and a second radiation detector for fluoroscopic imaging. The first radiation detector includes a first photo detection device and a luminous device. The luminous device generates visible light by absorbing radiation transmitted through the first photo detection device. The first radiation detector detects the visible light generated by the luminous device. The second radiation detector is constituted by the luminous device and a second photo detection device disposed downstream of the luminous device in an optical path direction of the radiation. The second photo detection device detects the visible light generated by the luminous device. The second radiation detector is changed over to the first radiation detector, so that still imaging can be started by rapid setting during operation of fluoroscopic imaging. | 04-17-2014 |
20140103222 | RADIATION IMAGING SYSTEM - This radiation imaging system has a radiation source, a case, and a radiation detection device which is housed in the case, and is equipped with a radiation detector having a conversion unit that converts radiation from the radiation source, which has passed through at least a subject, to radiation image information, wherein a prediction is made as to whether the afterimage phenomenon has occurred in the conversion unit, and if it is predicted that the phenomenon has occurred, at least the conversion unit is moved. | 04-17-2014 |
20140107463 | RADIATION IMAGE CAPTURING SYSTEM AND RADIATION IMAGE CAPTURING METHOD - A radiation image capturing system and a radiation image capturing method, wherein this radiation image capturing system comprises a radiation source, a radiation detection device provided with a radiation detector for converting radiation that has been transmitted through at least a subject from the radiation source into radiation image information, a photographing sequence setting unit for setting the photographing sequence of radiation photographing when successive radiation photographing is performed, and a photographing sequence display unit (a display device, a cassette display unit, a terminal display unit) for displaying the set photographing sequence. | 04-17-2014 |
20140110595 | RADIATION IMAGING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND RADIATION IMAGE DETECTION DEVICE - A determination section of an FPD checks external information against a determination table and determines whether detection of a rise of X-ray pulses is allowed based on an output voltage from a short-circuited pixel. The FPD detects X-ray images. The external information is transmitted from an imaging control device. The X-ray pulses are sequentially generated by an X-ray generating apparatus. A controller selects a pulse irradiation mode in a case where the detection of the rise of the X-ray pulse is allowed. If not, a successive irradiation mode is selected. In the pulse irradiation mode, the rise and the fall of the X-ray pulse are detected and timing of storage operation is synchronized with the detected timing of the rise. In the successive irradiation mode, the storage operation is performed at predetermined time intervals without the detection of the rise and the fall of the X-ray pulse. | 04-24-2014 |
20140161228 | RADIOGRAPHY SYSTEM AND RADIOGRAPHY METHOD - In a radiography system and radiography method according to the present invention, the radiography system comprises: a radiography device further comprising a radiation device further comprising a radiation source, and a radiation detection device which converts radiation which passes through a radiography subject into radiography information; and a system control portion which controls the radiography device to execute radiography at a set frame rate. The system control portion further comprises: a radiation emission disabling portion which interrupts the irradiation of radiation from the radiation source at least in a case where an error occurs with the radiography device; and a recovery processing portion which implements control so as to set the irradiation energy of the radiation source to a preset low irradiation energy and execute the radiography in a case where recovering from the error state. | 06-12-2014 |
20140209806 | RADIOGRAPHY SYSTEM AND RADIOGRAPHY METHOD - The present invention pertains to a radiography system and a radiography method. A radiation output device has a plurality of radiation sources disposed along a predetermined plane. Also, in accordance with whether an imaging state is a still image mode or a moving picture mode, at least one of the radiation sources that outputs radiation among the plurality of radiation sources is selected. | 07-31-2014 |
20140275954 | RADIOGRAPHY SYSTEM - This radiography system has a switching processing unit that switches the device that controls a radiation source and a radiography device to a control device or a portable apparatus. In a case where penetrative imaging has started, the switching processing unit switches the device that controls the radiation source and the radiography device from the control device to the portable apparatus. | 09-18-2014 |