| Varian Medical Systems, Inc. Patent applications |
| Patent application number | Title | Published |
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| 20120114104 | ASYMMETRIC X-RAY TUBE - An asymmetric x-ray tube. In one example embodiment, an x-ray tube includes an evacuated enclosure, a cathode assembly at least partially positioned within the evacuated enclosure and defining a first axis, and an anode assembly at least partially positioned within the evacuated enclosure and defining a second axis. The anode assembly includes a rotating anode having a focal spot. The focal spot and the second axis define a plane. The first axis is positioned beneath the plane. | 05-10-2012 |
| 20120106713 | ELECTRICALLY INSULATING X-RAY SHIELDING DEVICES IN AN X-RAY TUBE - Electrically insulating x-ray shielding devices in an x-ray tube. In one example embodiment, an x-ray tube includes an evacuated enclosure, a cathode and an anode at least partially positioned within the evacuated enclosure, and an electrically insulating x-ray shielding device proximate to the evacuated enclosure. The electrically insulating x-ray shielding device includes an oxide or nitride material having an atomic number from 57 to 74. | 05-03-2012 |
| 20120097871 | ENERGY MODULATOR FOR MODULATING AN ENERGY OF A PARTICLE BEAM - An energy modulator for use with a particle source that provides a beam of particles includes a first block moveable between a first position and a second position, wherein when the first block is at the second position, it is in a path of the beam, and a second block moveable relative to the first block, wherein the second block and the first block are offset from each other in a direction of the beam, wherein the first block has a first energy absorption characteristic, and the second block has a second energy absorption characteristic that is different from the first energy absorption characteristic. | 04-26-2012 |
| 20120087478 | BEAM FILTER POSITIONING DEVICE - A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line. | 04-12-2012 |
| 20120083645 | ECG-CORRELATED RADIOTHERAPY - A method of delivering radiation includes obtaining a first signal that represents a cardiac state of the subject, and generating a control signal using a processor to operate a component of a treatment radiation machine based at least in part on the first signal. A method of delivering radiation includes determining a cardiac state of the subject, and generating a control signal using a processor to operate a component of a treatment radiation machine based at least in part on the determined cardiac state. | 04-05-2012 |
| 20120082356 | IMAGE DATA COMPRESSION AND DECOMPRESSION - A method of processing image data includes obtaining an image set that includes at least a first image and a second image, determining a deformation registration using the first and second images, wherein the act of determining the deformation registration is performed using a processor, performing image compression on at least a portion of the image set using the determined deformation registration to obtain compressed image data, and storing the compressed image data. A method of processing image data includes obtaining compressed image data, obtaining a deformation registration previously used to create the compressed image data, performing image decompression on the compressed image data using the deformation registration to obtain decompressed image data, wherein the act of performing the image decompression is performed using a processor, and storing the decompressed image data. | 04-05-2012 |
| 20120082297 | Method and Apparatus Pertaining to Use of a Switched Voltage Clamp with an X-Ray Detector Amplifier - An x-ray detector amplifier operably couples to an analog-to-digital converter interface and a switched voltage clamp is operably disposed there between. By one approach, the switched voltage clamp comprises a switched electrical connection to a constant potential (such as, but not limited to, ground). These teachings will accommodate a control circuit configured to control the switched voltage clamp. This can comprise, for example, controlling the switched voltage clamp in synchronicity with the pulsed x-ray source. These teachings will also accommodate an integrator operably connected between the x-ray detector amplifier and the analog-to-digital converter interface. In such a case, the switched voltage clamp and be controlled to remove substantially any voltage offset contribution of the x-ray detector amplifier (due, for example, to significant temperature excursions) to a signal that is integrated by the aforementioned integrator. | 04-05-2012 |
| 20120082294 | X-RAY SYSTEM AND METHOD - An x-ray system includes an x-ray tube having an anode and a cathode, a sensor configured to sense a condition that results from an operation of the x-ray tube, and a communication device for transmitting a signal to a panel based at least in part on the sensed condition, the panel configured to receive radiation and generate image signals in response to the received radiation. An imaging method includes sensing a condition that results from an operation of an x-ray tube, and transmitting a signal to a panel in response to the sensed condition, wherein the panel is configured to generate image signals in response to radiation, and includes a plurality of image elements. | 04-05-2012 |
| 20120076278 | INTEGRAL LIQUID-COOLANT PASSAGEWAYS IN AN X-RAY TUBE - Integral liquid-coolant passageways in an x-ray tube. In one example embodiment, an x-ray tube includes a can at least partially defining an evacuated enclosure, a cathode at least partially positioned within the evacuated enclosure, and an anode at least partially positioned within the evacuated enclosure. The can has first integral liquid-coolant passageways formed therein. The can is configured to have a liquid coolant circulated through the first integral liquid-coolant passageways to thereby cool the can without the can being submersed in a liquid coolant. | 03-29-2012 |
| 20120076259 | Method and Apparatus Pertaining to Computed Tomography Scanning Using a Calibration Phantom - These various embodiments serve to facilitate improving the accuracy of a computed tomography (CT) process. This can comprise operably coupling at least one calibration phantom to a CT scan table and then, during a CT scan of an object that is disposed on the scan table, also gathering calibration information using that calibration phantom(s). By one approach, this calibration phantom can comprise one or more annular-shaped members. When using a plurality of annular-shaped members, at least some of the annular-shaped members can be disposed concentrically with one another. By one approach, in lieu of the foregoing or in combination therewith, this calibration phantom can comprise one or more pins and/or spherically-shaped members (and/or other shapes of geometric interest). If desired, such spherically-shaped members can be combined with the aforementioned pins. | 03-29-2012 |
| 20120068087 | SYSTEM AND METHOD FOR HIGH RESOLUTION RADIATION FIELD SHAPING - A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape. | 03-22-2012 |
| 20120057681 | X-RAY TARGET MANUFACTURED USING ELECTROFORMING PROCESS - One or more components of an x-ray target assembly are manufactured using an electroforming process. The electroforming is carried out by providing an electroforming apparatus that includes an electrolyte, a metal anode, and an electrically conductive cathode. The cathode includes an intermediate x-ray target assembly upon which the metal is to be deposited and/or an electrically conductive mold for forming a component of an x-ray target assembly. The x-ray target component (e.g., a substrate or focal track) is formed by submersing the cathode in the electrolyte and applying a voltage across the anode and the cathode to cause the metal from the anode to be electroformed on the intermediate target and/or the mold. The electroforming is continued until a desired thickness of metal is achieved. The electroforming process can be used to manufacture an x-ray target substrate, focal track, stem, barrier, or other metal layer of the target assembly. | 03-08-2012 |
| 20120043482 | MULTI LEVEL MULTILEAF COLLIMATORS - A multilevel MLC includes a first set and a second set of a plurality of pairs of beam blocking leaves arranged adjacent one another. Leaves of each pair in the first set are disposed in an opposed relationship and longitudinally movable relative to each other in a first direction. Leaves of each pair in the second set are disposed in an opposed relationship and longitudinally movable relative to each other in a second direction generally parallel to the first direction. The first and second sets of pairs of leaves are disposed in different planes. | 02-23-2012 |
| 20120043481 | MULTILEAF COLLIMATORS WITH TRANSVERSE MOTION - A collimation assembly includes a multileaf collimator and motion assembly. The multileaf collimator includes a support body and a plurality of pairs of beam blocking leaves supported by the support body. The beam blocking leaves are longitudinally movable in a first direction. The motion assembly includes an actuator and a guide assembly operable to move the support body and thereby allowing the plurality of pairs of beam blocking leaves to move in a second direction generally transverse to the first direction. | 02-23-2012 |
| 20120027182 | CATHODE ASSEMBLY FOR AN X-RAY TUBE - A cathode assembly for an x-ray tube. In one example embodiment, a cathode assembly includes a cathode head, a filament, and first and second focusing tabs. The cathode head defines a recess having first and second open ends, a slot within the recess, and first and second tab stops within the recess. The filament is positioned within the slot. The first focusing tab is positioned in the first open end of the recess abutting the first tab stop. The second focusing tab is positioned in the second open end of the recess abutting the second tab stop. | 02-02-2012 |
| 20120014509 | LIQUID METAL CONTAINMENT IN AN X-RAY TUBE - Liquid metal containment in an x-ray tube. In one example embodiment, an x-ray tube anode assembly includes a stationary shaft terminated by a head and an anode connected to an anode hub. The anode hub is at least partially surrounding the head of the stationary shaft. The anode hub defines a hub opening through which the stationary shaft extends. The anode hub is configured to contain a volume of a liquid metal and to rotate around the stationary shaft. The anode hub also defines a catch space within the anode hub that is configured to catch the liquid metal in order to contain the liquid metal within the hub regardless of the orientation of the x-ray tube anode assembly. | 01-19-2012 |
| 20110311028 | X-RAY TUBE ROTATING ANODE - An x-ray tube rotating anode. In one example embodiment, an x-ray tube rotating anode includes a hub configured to attach to a bearing assembly, rings positioned radially outward from the hub, bridges connecting the rings together, annular ring fins each attached to one of the rings, a focal track positioned radially outward from the annular ring fins, and annular focal track fins attached to the focal track. | 12-22-2011 |
| 20110305324 | X-RAY TARGET AND METHOD OF MAKING SAME - In one example, an x-ray target comprises a target track, a substrate, and an optional backing. The target track includes a base material and a grain growth inhibitor to reduce or prevent microstructure grain growth in the base material. The target track can be included as part of an x-ray tube anode, either of a rotary form or a stationary form. | 12-15-2011 |
| 20110299652 | METHODS, APPARATUS, AND COMPUTER-PROGRAM PRODUCTS FOR INCREASING ACCURACY IN CONE-BEAM COMPUTED TOMOGRAPHY - Disclosed are methods, systems, and computer-product programs for increasing accuracy in cone-beam computed tomography. | 12-08-2011 |
| 20110298299 | Method and Apparatus Pertaining to Interlaced Amplitude Pulsing Using a Hard-Tube Type Pulse Generator - These various embodiments serve to facilitate interlaced amplitude pulsing using a hard-tube type pulse generator having at least one energy-storage unit each comprising at least one energy-storing capacitor. Generally speaking, this comprises controlling an amount of energy withdrawn from the energy-storage unit and provided to an output load to form productive electric pulses by controlling at least one of: (1) energy replenishment; and (2) non-productive energy withdrawal of the energy-storage unit, to thereby achieve a series of productive interlaced amplitude electric pulses. | 12-08-2011 |
| 20110280440 | Method and Apparatus Pertaining to Rendering an Image to Convey Levels of Confidence with Respect to Materials Identification - A control circuit accesses image information regarding an image of a target. This information comprises, at least in part, information regarding material content of the target. The control circuit also accesses confidence information regarding at least one degree of confidence as pertains to the target's material content. The control circuit uses this confidence information to facilitate rendering the image such that the rendered image integrally conveys information both about materials included in the target and a relative degree of confidence that the materials are correctly identified. | 11-17-2011 |
| 20110267343 | Reducing Variation in Radiation Therapy Treatment Planning - A method and apparatus are disclosed that reduces variation in radiation therapy treatment planning among plurality of users within the same or different geographic locations. The system includes a method and an apparatus that provide users with the knowledge information and utilizing the knowledge information to contour target volumes for radiation treatment planning. The mode of operation includes utilizing a stand-alone workstation or a server computer connected to the plurality of thin client workstations. | 11-03-2011 |
| 20110249088 | SYSTEMS AND METHODS FOR MONITORING RADIATION TREATMENT - A method of monitoring radiation treatment employs a video camera directed to at least a portion of a patient and/or patient support and at least a portion of a radiation machine. The direction of movement of the radiation machine and/or clearance between at least a portion of the radiation machine and the patient are determined by a control system. Graphics indicating the direction of movement of the machine and/or the clearance between the machine and the patient are overlaid on the video images. The video images overlaid with graphics displayed on a display. | 10-13-2011 |
| 20110235940 | TRANSIENT PIXEL DEFECT DETECTION AND CORRECTION - A method of processing images produced by an imaging system includes detecting transient defects by comparing the value of a selected pixel with values of a plurality of the neighboring pixels, excluding known defective pixels. The value of the selected pixel may be compared with the maximal or minimal value of the neighboring pixels, and if the comparison shows that the value of the selected pixel exceeds the maximal or minimal value by a predetermined value, then the pixel may be identified as producing transient defect. Alternatively, the value of the selected pixel may be compared with the median value of the neighboring pixels, and if the comparison shows that the value of the selected pixel deviates the median value by a predetermined value, then the pixel may be identified as producing transient defect. | 09-29-2011 |
| 20110217236 | RADIATION SENSITIVE LIPOSOMES - The present invention relates to a radiation sensitive liposome, and the use of this liposome as carrier for therapeutic and diagnostic agent(s). In particular, the invention encompasses a liposomal delivery system, comprising a stable liposome-forming lipid and a polymerizable colipid, a fraction of which polymerizable colipid polymerizes upon exposure to ionizing, radiation, thereby destabilizing the liposomal membrane. Destabilization of liposomes allows for leakage of liposomal contents. The present invention further contemplates methods of diagnosing and treating conditions and diseases that are responsive to liposome-encapsulated or associated agents. | 09-08-2011 |
| 20110200178 | PRONE PATIENT POSITIONING DEVICES AND METHODS - A radiotherapy couch top includes a cantilevered section adapted to support at least a portion of a prone patient's upper body. The cantilevered section may be provided with an opening configured to allow at least a portion of the body portion to extend into from above and to allow a radiation beam to pass through from below. | 08-18-2011 |
| 20110182402 | IMAGING BREAST CANCEROUS LESIONS WITH MICROCALCIFICATIONS - A radiation system includes a first radiation source and a first detector positioned opposite to each other configured to image a body portion, and a second radiation source and a second detector positioned opposite to each other configured to image a region of interest in the body portion. The first radiation source has a first spot size and the first detector has a first pixel size. The second radiation source has a second spot size and the second detector has a second pixel size. The first spot size of the first radiation source may be different from the second spot size of the second radiation source, and/or the first pixel size of the first detector may be different from the second pixel size of the second detector. | 07-28-2011 |
| 20110154569 | MOBILE PATIENT SUPPORT SYSTEM - A patient support system includes a base having a plurality of wheels, and a patient support coupled to the base, wherein at least a part of the patient support is for supporting a head of a patient, and at least one of the wheels has a plurality of secondary wheels. A patient support system includes a patient support, a transportation mechanism for transporting the patient support, a positioner for moving the patient support relative to the transportation mechanism, and a positioning system for determining an actual position associated with the patient support with respect to a multi-dimensional coordinate system, wherein one of the transportation mechanism and the positioner is for coarse positioning of the patient support, and another one of the transportation mechanism and the positioner is for fine positioning of the patient support. | 06-30-2011 |
| 20110148339 | Homing and Establishing Reference Frames for Motion Axes in Radiation Systems - A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value. | 06-23-2011 |
| 20110133094 | MULTI-ENERGY RADIATION DETECTOR - A radiation projection detector includes a conversion layer configured to generate light photons in response to a radiation, the conversion layer having a plurality of first conversion elements and a plurality of second conversion elements, and a photo detector array aligned with the conversion panel, wherein each of the first conversion elements has a first radiation conversion characteristic, and each of the second conversion elements has a second radiation conversion characteristic. A radiation projection detector includes a photoconductor layer configured to generate charges in response to radiation, the photoconductor layer having a plurality of first photoconductor elements and a plurality of second photoconductor elements, and a detector array aligned with the photoconductor layer, wherein each of the first photoconductor elements has a first charge generating characteristic, and each of the second photoconductor elements has a second charge generating characteristic. | 06-09-2011 |
| 20110075815 | BEAM FILTER POSITIONING DEVICE - A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line. | 03-31-2011 |
| 20110074288 | Energy Switch Assembly for Linear Accelerators - An energy switch assembly includes probe components that can undergo and survive elevated temperatures of a bake-out procedure, and drive components that have capabilities of continuous positioning a probe throughout the stroke of the probe. The drive components can be removable from the probe components and replaceable without breaking the vacuum of the accelerator guide assembly. | 03-31-2011 |
| 20110058647 | REAL-TIME MOTION TRACKING USING TOMOSYNTHESIS - One embodiment of the present disclosure sets forth a method for determining a movement of a target region using tomosynthesis. The method includes the steps of accessing a first set of projection radiographs of the target region over a first processing window defined by a first range of projection angles, accessing a second set of projection radiographs of the target region over a second processing window defined by a second range of projection angles, wherein the first processing window moves to the second processing window, and comparing a first positional information derived from the first set of the projection radiographs and a second positional information derived from the second set of the projection radiographs with the first positional information to determine the movement of the target region. | 03-10-2011 |
| 20110051899 | TARGET ASSEMBLY WITH ELECTRON AND PHOTON WINDOWS - An X-ray target assembly includes a substrate, a target supported by the substrate adapted to generate X-rays when impinged by an electron beam, and an enclosure over the target providing a volume for the target. The enclosure is made of a material substantially transparent to electrons. The volume is substantially vacuum or filled with an inert gas. | 03-03-2011 |
| 20110051898 | ELECTRON EMITTER AND METHOD OF MAKING SAME - One example embodiment includes an electron emitter. The electron emitter comprises a conductive member that defines a plurality of filament segments that are integral with each other. Each filament segment includes an intermediate portion and an interconnecting portion attached to an adjacent filament segment. The intermediate portions are substantially coplanar with each other and each intermediate portion includes a substantially planar electron emission surface. | 03-03-2011 |
| 20110044493 | Apparatus to Facilitate Capturing Samples As Pertain to an Object to Be Imaged and Corresponding Method - One facilitates capturing samples as pertain to an object to be imaged by providing N pulsed sampling chains (where N is an integer greater than 1) where these sampling chains are in planes substantially parallel to one another and are substantially equidistant from adjacent others by a given distance. By one approach, the ratio of this given distance to a desired sample interval is approximately an integer that is relatively prime to N. So configured, a complete set of samples of the object can be captured by the sampling chains in a single pass notwithstanding that the object and the sampling chains are moving quickly with respect to one another. | 02-24-2011 |
| 20110038462 | LIQUID-COOLED APERTURE BODY IN AN X-RAY TUBE - A liquid-cooled aperture body in an x-ray tube. In one example embodiment, an x-ray tube is configured to be at least partially submerged in a liquid coolant. The x-ray tube includes a cathode at least partially positioned within a cathode housing, an anode at least partially positioned within a can, and an aperture body coupling the cathode housing to the can. The can is formed from a first material and the aperture body is formed from a second material. The aperture body defines an aperture through which electrons may pass between the cathode and the anode. The aperture body further defines at least two exterior surfaces that are each configured to be exposed to the liquid coolant in which the x-ray tube is at least partially submerged. | 02-17-2011 |
| 20110038461 | EVACUATED ENCLOSURE WINDOW COOLING - In one example, an x-ray tube includes an evacuated enclosure and an anode disposed with the evacuated enclosure. The anode is configured to receive electrons emitted by an electron emitter. The x-ray tube also includes an evacuated enclosure window disposed within a port of the evacuated enclosure. The evacuated enclosure window includes first and second axes, the first axis being relatively shorter than the second axis. The x-ray tube also includes means for directing coolant flow. The means for directing coolant flow causes coolant to flow across an exterior surface of the evacuated enclosure window in a direction substantially parallel to the first axis. | 02-17-2011 |
| 20110038459 | X-RAY TUBE BEARING SHAFT AND HUB - In one example, an assembly comprises a hub and a shaft. The hub defines an axis of rotation and includes first and second flanges that at least partly define a substantially cylindrical hub opening. The shaft is connected to the hub and includes a first end and a shaft cavity. The first end is received within the hub opening. The shaft cavity is formed in the first end and includes a bottom having a substantially curved transition area. | 02-17-2011 |
| 20100322385 | FREQUENCY TUNED ANODE BEARING ASSEMBLY - In one example embodiment, an x-ray tube comprises an anode configured to rotate at an operating frequency, and a bearing assembly configured to rotatably support the anode and tuned to a resonant frequency that is different than the operating frequency. | 12-23-2010 |
| 20100322384 | ROTATING ANODE WITH HUB CONNECTED VIA SPOKES - One example embodiment includes an anode. The anode comprises an anode hub, an annular target and a plurality of spokes. The spokes connect the anode hub to the annular target. The spokes are configured to substantially mechanically and/or thermally isolate the anode hub from the annular target. | 12-23-2010 |
| 20100322383 | X-RAY TUBE BEARING ASSEMBLY - In one example, an x-ray tube comprises an evacuated enclosure and a cathode disposed within the evacuated enclosure. An anode is also disposed within the evacuated enclosure opposite the cathode so as to receive electrons emitted by the cathode. A rotor sleeve is coupled to the anode, the rotor sleeve being responsive to applied electromagnetic fields such that a rotational motion is imparted to the anode. A magnetic assist bearing assembly rotatably supports the anode. | 12-23-2010 |
| 20100310175 | Method and Apparatus to Facilitate Using Fused Images to Identify Materials - First image data (which comprises a penetrating image of an object formed using a first spectrum) and second image data (which also comprises a penetrating image of this same object formed using a second, different spectrum) is retrieved from memory and fused to facilitate identifying at least one material that comprises at least a part of this object. The aforementioned first spectrum can comprise, for example, a spectrum of x-ray energies having a high typical energy while the second spectrum can comprise a spectrum of x-ray energies with a relatively lower typical energy. By one approach, this process can associate materials as comprise the object with corresponding atomic numbers and hence corresponding elements (such as, for example, uranium, plutonium, and so forth). | 12-09-2010 |
| 20100310042 | Method and Apparatus to Facilitate Using Multiple Radiation-Detection Views to Differentiate One Material From Another - At least three radiation-detection views are used to facilitate identifying material as comprises an object being assessed along a beam path relative to that object. This comprises developing a first radiation-detection view ( | 12-09-2010 |
| 20100289821 | PATIENT VISUAL INSTRUCTION TECHNIQUES FOR SYNCHRONIZING BREATHING WITH A MEDICAL PROCEDURE - A method of prompting a patient includes informing a patient a relationship between a result of an activity being performed by the patient and a first target result to be achieved by the activity. A method of prompting a patient includes informing a patient a relationship between a time and a target result to be achieved by an activity. A method of prompting a patient includes informing a patient a relationship between a position of a portion of the patient and a first target position for the portion. | 11-18-2010 |
| 20100284519 | Electron Emitter Apparatus and Method of Assembly - An electron emitter assembly, and methods of assembly, is disclosed. The emitter assembly includes an electron emitter that is secured to a support device in a manner such that the emitter is substantially thermally isolated from the support device. | 11-11-2010 |
| 20100278307 | Thermionic Emitter Designed To Provide Uniform Loading and Thermal Compensation - An electron emitter assembly for use in an x-ray emitting device or other electron emitter-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes an electron emitter having a plurality of substantially parallel emission surfaces that collectively emit a beam of electrons for impingement on the target anode. In one aspect, the plurality of substantially parallel emission surfaces are angled relative focusing region so as to provide a substantially uniform thermal load on the target anode. In another aspect, the electron emitter includes a plurality of cut-outs that accommodate thermal expansion in the plane of the emitter. Accommodating thermal expansion in the plane of the emitter prevents distortions to the emitter that would tend to alter the focusing of the electrons on the target anode. Providing a substantially uniform thermal load on the target anode and preventing thermal distortion of the emitter lead to higher x-ray flux and better focusing for higher quality x-ray images. | 11-04-2010 |
| 20100266102 | X-RAY TARGET ASSEMBLY AND METHODS FOR MANUFACTURING SAME - The x-ray target assemblies have an oxide dispersion strengthened (ODS) refractory metal alloy substrate that is bonded to a carbon-containing heat sink. The x-ray target assemblies have excellent bonding between the substrate and the heat sink. The improved bonding is achieved by placing an oxide-free barrier layer between the ODS metal substrate and the heat sink. The oxide-free barrier layer minimizes or eliminates chemical reactions that would otherwise be possible between the dispersed oxides and the carbon-based heat sink during the manufacturing process. Preventing these undesired reactions while manufacturing the x-ray target assembly yields a device with improved bonding between the heat sink and the substrate, compared to devices manufactured without the barrier layer. | 10-21-2010 |
| 20100246753 | Fourth Generation Computed Tomography Scanner - A computed tomography apparatus includes a gantry having a rotary portion and a stationary portion. At least one radiation source and at least one anti-scatter grid are mounted on the rotary portion of the gantry and positioned opposite each other. A detector device is mounted on the stationary portion of the gantry. The detector device may include a plurality of detector sensors arranged in the form of a generally circular ring surrounding the periphery of the rotary portion. Alternatively, the detector device may include a plurality of flat panel detectors arranged in a generally circular geometry. | 09-30-2010 |
| 20100232572 | USE OF PLANNING ATLAS IN RADIATION THERAPY - A method for determining a radiation treatment plan for a patient includes determining a reference plan, the reference plan including information regarding a reference region that has a different configuration from that of a region in the patient, and using the reference plan to determine the treatment plan for the patient. A method for use in a treatment planning process includes determining a reference plan that includes information regarding a reference region, determining a deformation field that registers the reference region in the reference plan with a region for a patient, and determining a result of using the reference plan as it applies for the patient. | 09-16-2010 |
| 20100183118 | REAL-TIME MOTION TRACKING USING TOMOSYNTHESIS - One embodiment of the present disclosure sets forth a method for determining a movement of a target region using tomosynthesis. The method includes the steps of accessing a first set of projection radiographs of the target region over a first processing window defined by a first range of projection angles, accessing a second set of projection radiographs of the target region over a second processing window defined by a second range of projection angels, wherein the first processing window slides to the second processing window during treatment of the target region, and comparing a first positional information derived from the first set of the projection radiographs and a second positional information derived from the second set of the projection radiographs with the first positional information to determine the movement of the target region. | 07-22-2010 |
| 20100177873 | Apparatus and Method to Facilitate Dynamically Adjusting Radiation Intensity for Imaging Purposes - An x-ray-based radiation imaging apparatus ( | 07-15-2010 |
| 20100158385 | Rapid Matching of Noisy Spectra or Other Signal Patterns - A method for use in an object scanning process includes obtaining a reference spectrum that includes a plurality of reference peaks, and comparing the reference spectrum with an input spectrum that has a plurality of input peaks, wherein a number of the reference peaks is less than eight. A method for use in an object scanning process includes obtaining a reference spectrum that includes a plurality of reference peaks, comparing one of the reference peaks with a plurality of input peaks from an input spectrum, comparing another one of the reference peaks with the plurality of input peaks from the input spectrum, and determining a degree of similarity between the reference spectrum and the input spectrum using a result from the acts of comparing. | 06-24-2010 |
| 20100158198 | EYEWEAR FOR PATIENT PROMPTING - An apparatus for prompting a patient includes a structure configured to be mounted to a patient support, a screen coupled to the structure, and a projector located at a distance away from the screen. A method of prompting a patient that is being supported on a patient support includes adjusting a position of a screen relative to a projector, the screen having a surface, placing the screen in front of the patient such that the patient can see the surface, and providing an image on the screen using the projector. | 06-24-2010 |
| 20100128839 | Structure and Procedure for X-Ray CT Guided Cancer Treatment - A radiation apparatus includes a first radiation source configured to generate radiation suitable for therapeutic treatment, and a structure for supporting a body. The structure comprises a curved surface adapted to receive a body portion to be treated during a therapeutic treatment. | 05-27-2010 |
| 20100102244 | Methods and Systems for Treating Cancer Using External Beam Radiation - A radiation system employs magnetic field to move particle beams and radiation sources. The radiation system includes a source operable to produce a particle beam, a scanning magnet operable to scan the particle beam, and a target configured to be impinged by at least a portion of the scanned particle beam to produce radiation. | 04-29-2010 |
| 20100098214 | Methods and Systems for Treating Breast Cancer Using External Beam Radiation - A radiation apparatus includes a radiation source movable in translational and/or rotational degrees of freedom, and a structure adapted to support a body. The structure is provided with an opening to allow a portion of the body passing through to be exposed to at least a portion of the therapeutic radiation while in use. | 04-22-2010 |
| 20100080358 | X-Ray Target With High Strength Bond - In one example, an x-ray target comprises a substrate, a target core, and a target track. The substrate and target core are attached together utilizing a carbide layer and a braze layer. | 04-01-2010 |
| 20100080337 | Methods, Systems, and Computer-Program Products to Correct Degradation in Tomographic Images Caused by Extraneous Radiation - Disclosed are systems, methods, and computer program products that generate estimates of errors caused by extraneous radiation in tomographic systems, such as cone-beam computerized tomography (CBCT) systems, fluoroscopic tomography systems, radiographic tomography systems, laminar tomography imaging systems, and the like. In one group of inventions, spatial errors are estimated from projection data collected where a known spatial perturbation has been introduced into radiation intensity of the source. In another group of inventions, temporal errors are estimated from a sequence of projections where a known perturbation in the radiation intensity of the source for different projections has been introduced. | 04-01-2010 |
| 20100079053 | Cathode Assembly With Integral Tabs - A cathode shield comprising a shield body and tabs for defining a focal spot length. The tabs can be integral with the shield body and spaced a distance apart from each other. The tabs can at least partially define the focal spot length of an electron source associated with a cathode shield. The cathode shield can further comprise means for positioning the cathode shield relative to a component in a cathode assembly. | 04-01-2010 |
| 20100074411 | X-Ray Tube Window - In one example embodiment, an x-ray transmissive window includes an inner surface and an outer surface. An x-ray beam emitted by the x-ray system defines a beam path area on the inner surface of the window and a beam path area on the outer surface of the window. The inner surface is arranged for contact with cooling fluid of the x-ray system and is configured to prevent bubbles present in the cooling fluid from accumulating on the inner surface in the beam path area of the inner surface. The outer surface is configured to prevent fluid droplets from accumulating on the outer surface in the beam path area of the outer surface. | 03-25-2010 |
| 20100072382 | APPARATUS OF PHOTOCONDUCTOR CRYSTAL GROWTH - An image acquisition device comprises a photoconductor, a substrate including a detector array, and an interlayer between the photoconductor and the substrate, wherein the interlayer is formed of molecules having a first ligand and a second ligand. | 03-25-2010 |
| 20100069742 | Systems and Methods for Tracking and Targeting Object in a Patient Using Imaging Techniques - A method for use in a medical procedure includes obtaining a contrast-enhanced image of a portion of a patient, the portion of the patient having an object, obtaining a non-contrast-enhanced image of the portion, wherein the contrast-enhanced image and the non-contrast-enhanced image are created at different times, and determining a position of the object using the contrast-enhanced image and the non-contrast-enhanced image. A method for use in a medical procedure includes obtaining a contrast-enhanced image of a portion of a patient, the portion of the patient having an object, obtaining a non-contrast-enhanced image of the portion, and determining a position of the object using the contrast-enhanced image and the non-contrast-enhanced image, wherein the act of determining the position is performed is substantially real time. | 03-18-2010 |
| 20100067739 | Sequential Stereo Imaging for Estimating Trajectory and Monitoring Target Position - A method for determining a position of a target includes obtaining a first image of the target, obtaining a second image of the target, wherein the first and the second images have different image planes and are generated at different times, processing the first and second images to determine whether the target in the first image corresponds spatially with the target in the second image, and determining the position of the target based on a result of the act of processing. Systems and computer products for performing the method are also described. | 03-18-2010 |
| 20100066256 | Device for Reducing Peak Field an Accelerator System - An apparatus for regulating power in an accelerator system includes a directional coupler for sensing a power reflected from an accelerator towards a power source, and a power modulator for reducing an output of the power source based on the sensed power. A method for regulating power in an accelerator system includes sensing a power reflected from an accelerator towards a power source, and reducing an output of the power source based on the sensed power. | 03-18-2010 |
| 20100051833 | Energy Modulator for Modulating an Energy of a Particle Beam - An energy modulator for use with a particle source that provides a beam of particles includes a first block moveable between a first position and a second position, wherein when the first block is at the second position, it is in a path of the beam, and a second block moveable relative to the first block, wherein the second block and the first block are offset from each other in a direction of the beam, wherein the first block has a first energy absorption characteristic, and the second block has a second energy absorption characteristic that is different from the first energy absorption characteristic. | 03-04-2010 |
| 20100040202 | Stationary X-Ray Target and Methods for Manufacturing Same - Stationary x-ray target assemblies manufactured using a metal deposition process to form one or more metal layers of the target. In particular, the metal deposition process is used to form an x-ray target metal layer and/or a stress buffer zone on an x-ray target substrate. The stress buffer zone improves material properties of the metals and/or the bonding between the x-ray target metal layer and the substrate. Improved bonding between the x-ray target metal layer and the substrate also improves the heat dissipation properties of the stationary x-ray target assembly. | 02-18-2010 |
| 20100040201 | Cathode with a Coating Near the Filament and Methods for Making Same - One or more components of an x-ray cathode assembly are manufactured using a metal deposition process. The deposition process is carried out by providing a cathode shield and a cathode head with a cathode cup and a filament slot fabricated from a first metal, and forming a coating comprising a second metal on at least a portion of at least one of the filament slot, cathode cup, cathode head, and/or cathode shield using a deposition process so as to yield the x-ray cathode assembly. The deposition process is continued until a desired thickness of metal is achieved. Example deposition processes include electroforming, chemical vapor deposition, physical vapor deposition, plasma spray, high velocity oxygen fuel thermal spray, and detonation thermal spraying. | 02-18-2010 |
| 20100016649 | External Beam Radiotherapy And Imaging With Radioactive Isotope - A method of delivering external radiation beams to a target volume in a body portion includes positioning a radioactive isotope source at a plurality of locations spaced apart around the body portion, and collimating radiation beams of the radioactive isotope source from the plurality of locations, whereby the target volume in the body portion is deposited with a predetermined dose distribution. A radiation device employs a member having a configuration adapted to surround a body portion to be irradiated. The member has a channel and a plurality of collimators spaced apart along and coupled to the channel. The plurality of collimators define a plurality of dwelling locations for a radioactive isotope source in the channel and are configured to collimate radiation beams of the radioactive isotope source. | 01-21-2010 |
| 20090323898 | THERMIONIC EMITTER DESIGNED TO CONTROL ELECTRON BEAM CURRENT PROFILE IN TWO DIMENSIONS - An electron emitter assembly for use in an x-ray emitting device or other electron emitter-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes an electron emitter assembly for emitting a beam of electrons during tube operation. The electron emitter assembly comprises a refractory metal foil with a plurality of shaped rung structures for emitting an electron beam that maximizes flux while simultaneously focusing the electron beam in two dimensions. Focusing occurs primarily through an electrical field shaped by the electron emitter assembly and through balancing current density, electrical resistance, and heat loss through thermal conduction to control the regions that emit electrons. Furthermore, the refractory metal foil can be configured with a modified work function for preferential electron emission. | 12-31-2009 |
| 20090296885 | TREATMENT OF PATIENT TUMORS BY CHARGED PARTICLE THERAPY - A method of irradiating a target in a subject using charged particle therapy includes the steps of positioning a subject on a supporting device, positioning a delivery device adapted to deliver charged particles, and delivering charged particles to a target in the subject wherein the delivery device rotates around the target during delivery of at least a portion of the charged particles. | 12-03-2009 |
| 20090290773 | Apparatus and Method to Facilitate User-Modified Rendering of an Object Image - A user interface ( | 11-26-2009 |
| 20090290682 | METHODS, SYSTEMS, AND COMPUTER-PROGRAM PRODUCTS FOR ESTIMATING SCATTERED RADIATION IN RADIOGRAPHIC PROJECTIONS - Several related inventions for estimating scattered radiation in radiographic projections are disclosed. Several of the inventions use scatter kernels of various forms, including symmetric and asymmetric forms. The inventions may be used alone or in various combinations with one another. The resulting estimates of scattered radiation may be used to correct the projections, which can improve the results of tomographic reconstructions. Still other inventions of the present application generate estimates of scattered radiation from shaded or partially shaded regions of a radiographic projection, which may be used to correct the projections or used to adjust the estimates of scattered radiation generated according to inventions of the present application that employ kernels. | 11-26-2009 |
| 20090190714 | Methods, Apparatus, and Computer-Program Products for Increasing Accuracy in Cone-Beam Computed Tomography - Disclosed are methods, systems, and computer-product programs for increasing accuracy in cone-beam computed tomography. | 07-30-2009 |
| 20090147917 | System and Method for High Resolution Field Shaping - A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape. | 06-11-2009 |
| 20090060311 | SYSTEMS AND METHODS FOR PROCESSING X-RAY IMAGES - A method includes obtaining a first image of an object, obtaining a second image of an object, determining a level of correlation between the first and second images, and using the determined level of correlation between the first and second images to obtain information regarding a motion of the object. | 03-05-2009 |
| 20080317202 | System and Method for Imaging and Treatment of Tumorous Tissue in Breasts Using Computed Tomography and Radiotherapy - The present invention provides a system | 12-25-2008 |
