Varian Medical Systems Patent Applications

SHAPE SIMILARITY MEASURE FOR BODY TISSUE

Granted: March 23, 2017
Application Number: 20170084030
A shape similarity metric can be provided that indicates how similar two or more shapes are. A difference between a union of the shapes and an intersection of the shapes can be used to determine the similarity metric. The shape similarity metric can provide an average distance between the shapes. Different processes for determining shapes can be evaluated for accuracy based on the shape similarity metric. New or alternative shape-determining processes can be compared for accuracy against…

SYSTEMS AND METHODS FOR PATIENT POSITION MONITORING

Granted: January 19, 2017
Application Number: 20170014648
A method of monitoring a patient includes: obtaining an input image having a plurality of regions of interest by a processing unit; and determining a plurality of positions for the respective plurality of regions of interest by the processing unit; wherein the act of determining the plurality of positions comprises: accessing a plurality of templates; comparing the plurality of templates with respective areas in the input image using a comparator in the processing unit; and determining…

PIXEL CIRCUIT WITH CONSTANT VOLTAGE BIASED PHOTODIODE AND RELATED IMAGING METHOD

Granted: December 8, 2016
Application Number: 20160360133
An imaging system includes a plurality of pixel circuits each having a photodiode, a biasing circuit and a charge-to-voltage converter. The photodiode is configured to generate charges in response to light or radiation. The biasing circuit is configured to provide a constant bias voltage across the photodiode so as to drain the charges generated by the photodiode. The charge-to-voltage converter is configured to accumulate the charges drained by the biasing circuit and convert the…

IRRADIATION DEVICE AND METHOD

Granted: September 29, 2016
Application Number: 20160279447
Irradiation device for irradiating an irradiation object with heavy charged particles, comprising a support for the irradiation object, and an irradiation nozzle irradiating a charged particle beam towards the irradiation object, wherein the beam is deflected within the irradiation nozzle. The support for the irradiation object is moveable at least horizontally, and the irradiation nozzle is moveable at least vertically and rotatable around a nozzle swivel axis along which the particle…

RADIATION SYSTEMS WITH MINIMAL OR NO SHIELDING REQUIREMENT ON BUILDING

Granted: August 4, 2016
Application Number: 20160220848
A radiation system includes a support, a capsule rotatably coupled to the support, a radiation source movably coupled to the capsule, wherein the radiation source is configured to provide a treatment radiation beam, and is capable of being turned on or off in response to a control signal, and a collimator located next to the radiation source, wherein the capsule defines a space for accommodating a portion of a patient, and includes a shielding material for attenuating radiation resulted…

METHODS AND SYSTEMS FOR ESTIMATING SCATTER

Granted: July 28, 2016
Application Number: 20160213345
One example method for estimating scatter associated with a target object may include acquiring a set of original projection data that includes primary radiation and scattered radiation at one or more selected projection angles associated with the target object, generating a first set of estimated scatter data from the set of original projection data, generating reconstructed image data by performing a first pass reconstruction using the first set of estimated scatter data, and…

ELECTRONIC MEDICAL CHART

Granted: July 7, 2016
Application Number: 20160196390
A handheld electronic device includes a network communication device for wirelessly receiving information regarding a plurality of tasks involved in a treatment process for a patient from a database, a processor for processing the information regarding the plurality of tasks, a housing containing the processor, wherein the housing is configured for handheld, and a screen configured to display a graphic using the information regarding the plurality of tasks, the graphic indicating the…

RADIATION SYSTEM WITH ROTATING PATIENT SUPPORT

Granted: May 26, 2016
Application Number: 20160144199
A patient support system includes a patient support having a surface for supporting a patient and a longitudinal axis, and a positioner coupled to the patient support for positioning the patient support, wherein the positioner is configured to move the patient support along a path that has an arc, circular, or zig-zag shape, and wherein the path lies within a plane that forms an angle with the surface of the patient support.

METHODS FOR IMAGE PROCESSING

Granted: January 14, 2016
Application Number: 20160012584
An image processing method includes: obtaining an image that includes a ball image and a cone image; obtaining an estimate of a center of the ball image; converting the image to a converted image using a processor based at least in part on the estimate of the center of the ball image, wherein the converted image comprises a converted ball image that looks different from the ball image in the image, and a converted cone image that looks different from the cone image in the image;…

IMAGE PROCESSING OF IMAGES THAT INCLUDE MARKER IMAGES

Granted: January 7, 2016
Application Number: 20160005178
A method, includes: obtaining an image, the image having marker images and a background image; identifying presence of an object in the background image using a processor; and providing a signal for stopping a procedure if the presence of the object is identified. An image processing apparatus, includes: a processor configured for: obtaining an image, the image having marker images and a background image; identifying presence of an object in the background image; and providing a signal…

BEAM CURRENT VARIATION SYSTEM FOR A CYCLOTRON

Granted: December 10, 2015
Application Number: 20150359081
Beam current variation system for a cyclotron, arranged in the inner centre of the cyclotron, downstream from the ion source generating the charged particle beam, the system comprising a deflector system powered by a voltage and a collimator. The beam is dumped in the collimator, if the deflector system (10; 20, 21) is not powered, and the beam is switched on by powering the deflector system with a voltage.

MULTI LEVEL MULTILEAF COLLIMATOR LEAF TIP SHAPE EFFECTS AND PENUMBRA OPTIMIZATION

Granted: October 1, 2015
Application Number: 20150273239
A multi level multileaf collimator employs leaves with leaf tips having a non-square shape in a beam's eye view to improve beam shaping effect and penumbra performance. The multi level multileaf collimator includes a first multileaf collimator in a first level comprising beam blocking leaves longitudinally movable in a first direction, and a second multileaf collimator in a second level comprising beam blocking leaves longitudinally movable in a second direction. The first direction may…

LOW POWER STANDBY MODE IN WIRELESS IMAGERS

Granted: October 1, 2015
Application Number: 20150276942
This invention describes a novel solution to conserve battery and to overcome cold-start artifacts by maintaining the pixel charge traps at a stable value at all times. The design of NIP photodiode and TFT combination requires very low current (in order of hundreds of ?A) to stay biased at all times. This allows the pixel charge traps to be easily maintained at a stable value with low power consumption. Power consumption is kept at a minimum by keeping all panel electronics off and only…

SYSTEMS, METHODS, AND DEVICES FOR REAL-TIME TREATMENT VERIFICATION USING AN ELECTRONIC PORTAL IMAGING DEVICE

Granted: August 13, 2015
Application Number: 20150224342
A radiation dose received by a patient from a radiation therapy system can be verified by acquiring a cine stream of image frames from an electronic portal imaging device (EPID) that is arranged to detect radiation exiting the patient during irradiation. The cine stream of EPID image frames can be processed in real-time to form exit images providing absolute dose measurements at the EPID (dose-to-water values), which is representative of the characteristics of the radiation received by…

Computation of Radiating Particle and Wave Distributions using a Generalized Discrete Field Constructed from Representative Ray Sets

Granted: June 25, 2015
Application Number: 20150177712
The present system and method for simulating particles and waves is useful for calculations involving nuclear and full spectrum radiation transport, quantum particle transport, plasma transport and charged particle transport. The invention provides a mechanism for creating accurate invariants for embedding in general three-dimensional problems and describes means by which a series of simple single collision interaction finite elements can be extended to formulate a complex…

FEEDBACK MODULATED RADIATION SCANNING SYSTEMS AND METHODS FOR REDUCED RADIOLOGICAL FOOTPRINT

Granted: May 21, 2015
Application Number: 20150139386
Methods and systems for scanning objects comprising scanning a portion of an object by a first radiation beam having a first value of a beam characteristic, such as the dose, and detecting the first radiation beam after interaction with the object by a first detector. It is determined whether to change the first value to a second value based, at least in part, on the detected first radiation beam. That portion of the object is then scanned by a second radiation beam having the first…

X-RAY HOUSING HAVING INTEGRATED OIL-TO-AIR HEAT EXCHANGER

Granted: May 21, 2015
Application Number: 20150139406
An x-ray housing can include a tubular unitary body having an external fin array adjacent to an internal fin array through a heat exchanger portion of the unitary body, the internal fin array being on a luminal surface of a housing lumen of the unitary body. The external fin array can extend from a first end of the housing to a second end of the housing. The external fin array may be at a discrete and defined location, and extend around only a portion (e.g., 25%) of a circumference or…

TIME-RESOLVED PRE-TREATMENT PORTAL DOSIMETRY SYSTEMS, DEVICES, AND METHODS

Granted: May 7, 2015
Application Number: 20150124930
Systems, devices, and methods for pre-treatment verification of radiation dose delivery in arc-based radiation therapy devices using a time-dependent gamma evaluation method.

SYSTEM AND METHOD FOR TRIGGERING AN IMAGING PROCESS

Granted: April 30, 2015
Application Number: 20150119699
A system for triggering an imaging process, includes: a processing unit that is configured for: obtaining first information regarding a state of a device; processing the first information to determine if the state of the device satisfies a first pre-defined criterion; and generating a signal to cause an imaging process to begin based at least in part on a result from the act of processing. A system for triggering an imaging process, includes: a processing unit that is configured for:…

METHODS FOR IMAGE PROCESSING

Granted: April 2, 2015
Application Number: 20150093011
An image processing method includes: obtaining an image that includes a ball image and a cone image; obtaining an estimate of a center of the ball image; converting the image to a converted image using a processor based at least in part on the estimate of the center of the ball image, wherein the converted image comprises a converted ball image that looks different from the ball image in the image, and a converted cone image that looks different from the cone image in the image;…