Assignee: Varian Medical Systems, Inc.

Location: Palo Alto, CA
No. of patents: 101

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Number	Title	Issue Date
8184769	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 (101) as corresponds to the materi...	05/22/2012
8183801	Interlaced multi-energy radiation sources Multi-energy radiation sources comprising charged particle accelerators driven by power generators providing different RF powers to the accelerator, capable of interlaced operation, are disclosed. Automatic frequency control techniques are provided to match the freq...	05/22/2012
8178847	Data processing using reduced onboard memory Raw data (e.g., image data) can be captured and fed into a data processing unit (e.g., a frame grabber), which can process the raw data using data that is retrieved from, for example, the main memory of a computer system instead of from memory onboard the data proce...	05/15/2012
8175222	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 por...	05/08/2012
8174174	Cathode structures for X-ray tubes An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means s...	05/08/2012
8170180	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 anod...	05/01/2012
8165269	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. ...	04/24/2012
8155475	Method and apparatus to facilitate transforming grayscale level values An image processing apparatus (800) partitions (101) an image into a plurality of blocks. For a selected one of these blocks, the apparatus then uses a given available range of grayscale level values to determine (102) grayscale level values for...	04/10/2012
8137976	Dual angle radiation scanning of objects In one example, a method of examining contents of an object is disclosed comprising scanning an object by first and second radiation beams at at least first and second angles, detecting radiation at the first and second angles, and determining whether the object at ...	03/20/2012
8135205	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 pe...	03/13/2012
8130910	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...	03/06/2012
8121252	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 refe...	02/21/2012
8116430	Multi-mode cone beam CT radiotherapy simulator and treatment machine with a flat panel imager A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The fl...	02/14/2012
8111025	Charged particle accelerators, radiation sources, systems, and methods Man-portable radiation generation sources and systems that may be carried by hand to a site of interest by one or two people, are disclosed. Methods of use of such sources and systems are also disclosed. Battery operated radiation generation sources, air cooled radi...	02/07/2012
8098796	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 tra...	01/17/2012
8095203	Data processing for real-time tracking of a target in radiation therapy A facility for processing data is described. The facility receives a stream of digital location indications, each location indication identifying a location of a patient while undergoing radiation therapy. In response to each location indication of the string, in su...	01/10/2012
8077830	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 m...	12/13/2011
8077829	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. ...	12/13/2011
8067751	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 p...	11/29/2011
8059785	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...	11/15/2011
8054945	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 ...	11/08/2011
8049156	Method and apparatus for excess signal correction in an imager A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear...	11/01/2011
8036435	Cancer detection, diagnosis, staging, treatment planning, delivery, and monitoring using X-ray attenuation coefficient distributions A method of analyzing a volumetric data set obtained by an imaging system from an object is provided includes defining a first region of interest comprising a population of voxels of a first tissue part of the object to obtain a first distribution of radiation atten...	10/11/2011
8036341	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 su...	10/11/2011
8009794	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 (CBCT) by obscuring portions of the radiation source so that the radiation only passes through the specific areas of the patient related to the reg...	08/30/2011
8000450	Aperture shield incorporating refractory materials An x-ray tube electron shield is disclosed for interposition between an electron emitter and an anode configured to receive the emitted electrons. The electron shield is configured to withstand the elevated levels of heat produced by electrons backscattered from the...	08/16/2011
8000436	Radiation scanning units including a movable platform A scanning unit for inspecting objects comprises in one example a radiation source, a movable platform to support an object, and a detector positioned to receive radiation after interaction of radiation with the object. The platform is movable at least partially wit...	08/16/2011
7995813	Reducing variation in radiation treatment therapy 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 inform...	08/09/2011
7995708	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 s...	08/09/2011
7991121	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. ...	08/02/2011
7991117	Apparatus and method to facilitate dynamically adjusting radiation intensity for imaging purposes An x-ray-based radiation imaging apparatus (200) for use in imaging an object (201) can comprise a source of x-rays (202) having an output radiation intensity control input and a radiation intensity controller (207) operably coupled there...	08/02/2011
7983867	Multi-gain data processing Systems and methods of processing data generated using multi-gain detectors are disclosed. These systems and methods include separate gain images and separate offset images associated with each dynamic range of a multi-gain detector. These images are applied to mult...	07/19/2011
7983380	Radiation systems A radiation system includes a first ring, a radiation source capable of providing radiation suitable for treating a patient, the radiation source secured to the first ring, a second ring located behind the first ring, and an imager secured to the second ring. A radi...	07/19/2011
7961838	Computerized tomography image reconstruction Systems and methods include coordinated (KV) and megaelectronvolt (MV) computerized tomography (CT) imaging. KV and MV data are combined using a normalization process in order to generate CT images. The resulting CT images can include an improved signal to noise rat...	06/14/2011
7945021	Multi-mode cone beam CT radiotherapy simulator and treatment machine with a flat panel imager A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The fl...	05/17/2011
7940891	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 l...	05/10/2011
7924983	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 po...	04/12/2011
7922390	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 (103) detector-level calibration information for that scanner. This can comprise calculating (201) a theoretical traject...	04/12/2011
7903788	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 po...	03/08/2011
7884438	Megavoltage imaging with a photoconductor based sensor A photodetector for detecting megavoltage (MV) radiation comprises a semiconductor conversion layer having a first surface and a second surface disposed opposite the first surface, a first electrode coupled to the first surface, a second electrode coupled to the sec...	02/08/2011

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Assignee: Varian Medical Systems, Inc.