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Varian Medical Systems Inc patents


Recent patent applications related to Varian Medical Systems Inc. Varian Medical Systems Inc is listed as an Agent/Assignee. Note: Varian Medical Systems Inc may have other listings under different names/spellings. We're not affiliated with Varian Medical Systems Inc, we're just tracking patents.

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 new patent  Radiation therapy systems and methods

A radiation therapy system includes an accelerator and beam transport system that generates a beam of particles. The accelerator and beam transport system guides the beam on a path and into a nozzle that is operable for aiming the beam toward an object. ... Varian Medical Systems Inc

Radiation treatment planning and execution

An apparatus for use in a treatment planning process or in a treatment process, includes: an input for obtaining a parameter representing a number of beam on-off transitions; and a treatment planner configured to optimize a treatment plan based on parameter representing the number of beam on-off transitions. An apparatus includes: an input configured to obtain a width of a gating window for a treatment plan; and a gating window adjustor configured to adjust the width of the gating window during a treatment session. ... Varian Medical Systems Inc

Multi level multileaf collimator leaf tip shape effects and penumbra optimization

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. ... Varian Medical Systems Inc

Beam filter assembly and beam filter positioning device

In a beam filter assembly, a base filter is employed to modify a beam quality of a radiation beam of a base energy level and a first filter slice is stacked with the base filter to modify a beam quality of a radiation beam of a first energy level higher than the base energy level. In a beam filter positioning device, a base stage carries a base filter and a first stage carries a filter slice. ... Varian Medical Systems Inc

System and method for scanned ion beam interplay effect mitigation using random repainting

Interference of dose application in scanned ion beam therapy and organ motion, also called interplay effect, may lead to dose deviations at target volumes. Current repainting methods are susceptible to artefacts due to a predominant scanning direction, ranging from fringed field edges to under and overdosed regions (hot and cold spots). ... Varian Medical Systems Inc

Medical systems with patient supports

A patient supporting device includes: a base configured to translate in a room; a first member having a first end and a second end, wherein the first end of the first member is rotatably coupled to the base so that the first member is rotatable relative to the base about a first vertical axis; a second member having a first end and a second end, wherein the first end of the second member is rotatably coupled to the second end of the first member so that the second member is rotatable relative to the first member about a second vertical axis; and a platform for supporting a patient, wherein the platform is rotatably coupled to the second end of the second member so that the platform is rotatable relative to the second member about a third vertical axis.. . ... Varian Medical Systems Inc

System and methods for processing images to measure collimator jaw and collimator performance

Systems and methods are proposed for accurate and efficient automatic measurement of jaw and leaf positioning in multi-leaf collimator imaging systems. Specifically, the method enables the automated and objective processing of images to determine characteristics of collimator jaws and mlc leaves. ... Varian Medical Systems Inc

Creating treatment field using initial field and patient specific geometry and achievable dose

Methods and systems are provided for developing radiation therapy treatment plans. A treatment template with radiation fields can be chosen for a patient based on a tumor location. ... Varian Medical Systems Inc

Optimization of image acquisition parameters for registration with reference image

An apparatus includes input(s) for obtaining a first image and for obtaining a plurality of image parameters that includes at least a first image parameter and a second image parameter; a simulated image creation module configured for computing a plurality of simulated images based on the first image and the plurality of image parameters, the plurality of simulated images having at least a first simulated image computed based on the first image parameter, and a second simulated image computed based on the second image parameter, wherein the first simulated image has a first image quality, the second simulated image has a second image quality, and the first image quality is different from the second image quality; an image registration module configured for performing a plurality of image registrations using the simulated images; and a non-transitory medium configured for storing results from the act of performing the plurality of image registrations.. . ... Varian Medical Systems Inc

Controlling and shaping the dose distribution outside treatment targets in external-beam radiation treatments

Streamlined and partially automated methods of setting normal tissue objectives in radiation treatment planning are provided. These methods may be applied to multiple-target cases as well as single-target cases. ... Varian Medical Systems Inc

Generating time-efficient treatment field trajectories for external-beam radiation treatments

In a radiation treatment plan that includes a plurality of treatment fields of multiple treatment modalities, such as imrt modality and dynamic treatment path modality (e.g., vmat and conformal arc therapy), an optimized spatial point sequence may be determined that optimizes the total treatment time, which includes both the beam-on time (i.e., during the delivery of radiation dose) and the beam-off time (i.e., during transitions between consecutive treatment fields). The result is a time-ordered field trajectory that intermixes and interleaves different treatment fields. ... Varian Medical Systems Inc

Optimization of radiation treatment plans for optimal treatment time in external-beam radiation treatments

An optimized radiation treatment plan may be developed in which the total monitor unit (mu) count is taken into account. A planner may specify a maximum treatment time. ... Varian Medical Systems Inc

Image comparison tool tolerant to deformable image matching

An apparatus and method for determining an image similarity based on image features. In one aspect, the image similarity determination is based on an image comparison tool. ... Varian Medical Systems Inc

Method and device for efficiently irradiating a target from multiple irradiation angles in a particle therapy system

A control system is described which provides a user interface that displays a clear graphical representation of relevant data for a particle radiation therapy system (such as a pencil-beam proton therapy system) for treating multiple beam fields as efficiently as possible. The user interface allows a user to visualize a treatment session, select one or multiple beam fields to include in one or more beam applications, and dissociate beam fields previously grouped if necessary. ... Varian Medical Systems Inc

03/01/18 / #20180061609

Electromagnetic interference containment for accelerator systems

An apparatus for attachment to a component of a microwave device, includes: a cage; a shield within the cage, wherein the shield is in a form of a container, at least a majority of the shield spaced away from an interior wall of the cage; and a connector at the cage, wherein the connector is configured to connect to a cable connection, and wherein the connector is electrically connected to two terminals within the shield. An apparatus for coupling to an input connection of an electron gun, the input connection having a heater terminal and a cathode terminal, the apparatus comprising: a connector having a first configured to attach to a cable, and a second end configured to connect to the input connection of the electron gun; and wherein the connector comprises an opening configured to receive the heater terminal of the input connection of the electron gun.. ... Varian Medical Systems Inc

03/01/18 / #20180061036

System and method for determining position and orientation of depth cameras

A system for determining positional information of a camera, includes: a plane determination module configured to determine a first plane and a second plane based on a depth image; a plane-association module configured to associate the first plane determined by the plane determination module with a first tool-plane, and to associate the second plane determined by the plane determination module with a second tool-plane, the first and second tool-planes having known positional relationship with respect to each other; and a positional determination unit configured to determine the positional information of the camera based on an output from the plane-association module.. . ... Varian Medical Systems Inc

02/08/18 / #20180036556

System and method for in-layer synchronization for fast spot rescanning

To overcome the difficulties inherent in conventional proton therapy systems, new techniques are described herein for synchronizing the application of proton radiation with the periodic movement of a target area. In an embodiment, a method is provided that combines multiple rescans of a spot scanning proton beam while monitoring the periodic motion of the target area, and aligning the applications of the proton beam with parameters of the periodic motion. ... Varian Medical Systems Inc

02/01/18 / #20180028143

Imaging-based self-adjusting radiation therapy systems, devices, and methods

Systems, devices, and methods are presented for automatic tuning, calibration, and verification of radiation therapy systems comprising control elements configured to control parameters of the radiation therapy systems based on images obtained using electronic portal imaging devices (epids) included in the radiation therapy system.. . ... Varian Medical Systems Inc

02/01/18 / #20180028113

Methods and apparatus for the planning and delivery of radiation treatments

Methods and apparatus are provided for planning and delivering radiation treatments by modalities which involve moving a radiation source along a trajectory relative to a subject while delivering radiation to the subject. In some embodiments the radiation source is moved continuously along the trajectory while in some embodiments the radiation source is moved intermittently. ... Varian Medical Systems Inc

01/25/18 / #20180021595

Systems and methods for generating beam-specific planning target volume design outputs

System includes a beam generator to generate beam(s) for patient treatment and a computing device that obtains three-dimensional image(s) of a target structure that repositions with respect to surrounding tissue of the patient. The computing device creates plan(s) including a first three-dimensional probability distribution of patient's position and a second three-dimensional probability distribution of the repositioned structure's internal position. ... Varian Medical Systems Inc

12/21/17 / #20170360932

Immune modulators in combination with radiation treatment

Methods for treating tumors by administering ionizing radiation and an immune modulator to a patient with cancer are disclosed. The methods provide the dual benefits of anti-tumor efficacy plus normal tissue protection when combining immune modulators with ionizing radiation to treat cancer patients. ... Varian Medical Systems Inc

11/30/17 / #20170340901

Intuitive automation in patient modeling

To overcome the difficulties inherent in conventional treatment planning approaches, new techniques are described herein for providing an intuitive user interface for automatic structure derivation in patient modeling. In an embodiment, a graphical user interface is provided that provides a list of structures of a specified region. ... Varian Medical Systems Inc

10/12/17 / #20170295638

Shielding structures for linear accelerators

An apparatus includes an accelerator guide and a shielding structure enclosing the accelerator guide. The accelerator guide includes an electron source at a first end, a target at a second end, and a plurality of accelerating cavities coupled in series along a longitudinal axis between the first end and the second end. ... Varian Medical Systems Inc

10/05/17 / #20170286626

Multi-dimensional timeline system for integrated treatment viewing, planning and coordination

A system and method of generating a clinical timeline user interface includes receiving a plurality of clinical information items associated with at least one relationship between a healthcare provider entity and a patient entity, each clinical information item having an associated time. The method also includes filtering the clinical information items according to a relationship, the relationship comprising an indicated healthcare provider entity and at least one indicated patient. ... Varian Medical Systems Inc

10/05/17 / #20170286573

Linac simulator

A linear particle accelerator (linac) simulator employs a monte carlo-based use of repeated random sampling to produce a simulated result representing use of a particular physical medical-services linac with particular corresponding real-world parameters. A browser-based user opportunity permits uploading at least some of those real-world parameters to employ when using the linac simulator to produce the simulated result. ... Varian Medical Systems Inc

10/05/17 / #20170285183

Scintillating glass pixelated imager

In a method of making pixelated scintillators, a block of an amorphous scintillator material is divided into plural sections. The plural sections of the block are rejoined with plural first reflective septa to form an assembly. ... Varian Medical Systems Inc

10/05/17 / #20170281981

Radiation therapy systems and methods

A radiation therapy system includes an accelerator and beam transport system that generates a beam of particles. The accelerator and beam transport system guides the beam on a path and into a nozzle that can aim the beam toward an object. ... Varian Medical Systems Inc

10/05/17 / #20170281980

Adaptive pencil beam scanning

Embodiments of the present invention disclose methods and systems for producing an adaptive pencil beam having an adjustable lateral beam size and bragg-peak width. According to one disclosed embodiment, an apparatus for producing an adaptive pencil beam is disclosed. ... Varian Medical Systems Inc

10/05/17 / #20170281979

Radiation treatment platform and method using a portal imaging device to automatically control therapy administration

A portal imaging device is used to determine an amount of radiation that is delivered to at least one point while administering a radiation treatment therapy to a patient. Upon detecting that the amount of radiation that is delivered to that at least one point exceeds a predetermined amount of radiation (for example, a planned amount of radiation per the radiation treatment plan), administration of radiation treatment therapy to the patient can be automatically halted.. ... Varian Medical Systems Inc

10/05/17 / #20170281978

Dose-distribution estimation in proton therapy

A system for estimating a dose from a proton therapy plan includes a memory that stores machine instructions and a processor coupled to the memory that executes the machine instructions to subdivide a representation of a volume of interest in a patient anatomy traversed by a planned proton field into a plurality of voxels. The processor further executes the machine instructions to determine the distance from the source of the planned proton beam to one of the voxels. ... Varian Medical Systems Inc

10/05/17 / #20170281976

Systems and methods for detecting and/or measuring motion and position associated with a patient

An apparatus for patient position or motion monitoring includes: an energy source configured to emit energy from a first location to a second location, or vice versa, wherein the second location that is moveable relative to the first location in response to a movement by a patient; and a processing unit coupled to receive an input that is based on the emitted energy, and to determine a characteristic associated with the patient based on the input.. . ... Varian Medical Systems Inc

10/05/17 / #20170281975

Collision avoidance for radiation therapy

An outline of at least a patient on a patient support is determined. Based on at least one image of the patient, a plurality of orientations of the patient support and of at least one device are determined. ... Varian Medical Systems Inc

10/05/17 / #20170281974

Method and apparatus pertaining to treating a patient using heavy particles

A heavy-particle treatment system exposes a patient's treatment volume, during the course of a single treatment session, to beams of heavy particles from a variety of different angles. The source of heavy particles may rotate about the patient to facilitate that variety of different angles. ... Varian Medical Systems Inc

10/05/17 / #20170281971

Method and apparatus pertaining to radiation-treatment plan optimization

A radiation-treatment plan that comprises a plurality of dose-delivery fractions can be optimized by using fraction dose objectives and at least one other, different dose objective. This use of fraction dose objectives can comprise accumulating doses delivered in previous dose-delivery fractions. ... Varian Medical Systems Inc

09/28/17 / #20170278277

Methods and systems for improving image quality of projection image data acquired using flat panel detectors

One example method to improve image quality of projection image data may include obtaining projection image data and channel offset data associated with the projection image data. The channel offset data may be acquired using the flat panel detector and include at least one set of channel offset data values associated with respective channels of the flat panel detector. ... Varian Medical Systems Inc

09/28/17 / #20170274224

Method and apparatus pertaining to optimizing a radiation-treatment plan by permitting non-coincidental isocenters

A control circuit utilizes patient information and treatment-platform information to optimize a radiation-treatment plan by permitting isocenters of various radiation-treatment fields as comprise parts of a same treatment plan to not be coincidental with one another to thereby yield an optimized treatment plan. The patient information can pertain to one or more physical aspects of the patient as desired. ... Varian Medical Systems Inc

09/21/17 / #20170271116

X-ray tube with structurally supported planar emitter

A cathode head can include: an insulating member on a base; an electron emitter with a planar emitter surface formed by a plurality of elongate rungs connected together through a plurality of turns from a first emitter end to a second emitter end so as to form a serpentine emitter pattern; a plurality of elongate legs extending from the plurality of turns at an angle relative to the planar emitter surface, each of the legs being coupled with the insulating member; an elongate first lead leg at the first emitter end and an elongate second lead leg at the second emitter end; a first electrical lead and a second electrical lead extending from the base; and a first electrical coupler coupling the first electrical lead to the first lead leg and a second electrical coupler coupling the second electrical lead to the second lead leg.. . ... Varian Medical Systems Inc

09/21/17 / #20170266463

Detection of damage to x-ray targets in electron accelerators for radiotherapy

An x-ray apparatus includes a source configured to generate electrons, a target configured to produce x-rays upon impingement of electrons, and a detector configured to detect electrons penetrating the target or reflected from the incident face of the target, indicative of damage to the target.. . ... Varian Medical Systems Inc

09/21/17 / #20170266462

Systems and methods for generating beam-specific planning target volume design outputs

System includes a beam generator to generate beam(s) for patient treatment and a computing device that obtains three-dimensional image(s) of a target structure that repositions with respect to surrounding tissue of the patient. The computing device creates plan(s) including a first three-dimensional probability distribution of patient's position and a second three-dimensional probability distribution of the repositioned structure's internal position. ... Varian Medical Systems Inc

09/14/17 / #20170258414

Medical systems with patient supports

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 radiation system includes a first device having a radiation source capable of generating a radiation beam suitable for treating a patient, and a second device having imaging capability, wherein the first device is oriented at an angle that is less than 180° relative to the second device. ... Varian Medical Systems Inc

08/31/17 / #20170249740

5d cone beam ct using deformable registration

An apparatus includes: an input configured to receive a plurality of images, wherein the images include respective sub-images of a bodily part of a subject, and wherein a position of the bodily part relates to a breathing movement and a cardiac movement of the subject; a first registration engine configured to determine a first registration of at least two breathing correlated images, wherein the at least two breathing correlated images comprise two of the plurality of images or are derived from at least some of the plurality of images; a second registration engine configured to determine a second registration of at least two cardiac correlated images; and a volumetric image generator configured to generate a volumetric image using the first registration and the second registration.. . ... Varian Medical Systems Inc

08/31/17 / #20170245825

Automatic organ-dose-estimation for patient-specific computed tomography scans

In accordance with at least some embodiments of the present disclosure, a process for calculating patient-specific organ dose is presented. The process may include constructing a computed tomography (ct) volume based on ct images generated by a ct scanner. ... Varian Medical Systems Inc

08/24/17 / #20170239495

Particle therapy systems, devices, and methods for beam transportation

A beam transport assembly conveys a particle beam from a particle source to an irradiation nozzle, which rotates about a swivel axis at the horizontal input of the nozzle. A support can move horizontally in a plane perpendicular to the swivel axis. ... Varian Medical Systems Inc

08/10/17 / #20170227660

Imaging device using a close proximity tag to configure a wireless local area network (lan) transceiver

Technology is described for imaging device (e.g., x-ray detector) that includes a tag reader. In one example, the imaging device includes a imaging matrix of pixel detector elements, a wireless local area network (lan) transceiver, a tag reader, and a controller. ... Varian Medical Systems Inc

08/10/17 / #20170225015

Systems, methods, and devices for radiation beam alignment and radiation beam measurements using electronic portal imaging devices

Systems and methods for using electronic portal imaging devices (epids) as absolute radiation beam measuring devices and as radiation beam alignment devices without implementation of elaborate and complex calibration procedures.. . ... Varian Medical Systems Inc

08/03/17 / #20170220709

System and method for collision avoidance in medical systems

A method of detecting a possible collision in a medical procedure that involves a medical system, includes: obtaining an image of a patient that is supported on a patient support; determining a first model using a processing unit based at least in part on the image, at least a part of the first model representing a surface of the patient; determining a second model using the processing unit, the second model representing a first component of the medical system; virtually moving the first model, the second model, or both, using a collision prediction mechanism to simulate a movement of the first component of the medical system to determine whether there is a possible collision between the first component and the patient; and generating an output to indicate the possible collision or an absence of the possible collision.. . ... Varian Medical Systems Inc

08/03/17 / #20170216630

Systems for efficient daily consistancy check of proton therapy systems

Systems and methods are provided for efficiently performing daily maintenance or quality assurance on proton therapy systems. Specifically, a system is provided which includes a solid-state phantom, a plurality of ionization chambers disposed within the solid-state phantom, and a measuring device coupled to the plurality of ionization chambers and operable to perform radiation measurements of proton beams received within the plurality of ionization chambers. ... Varian Medical Systems Inc

07/27/17 / #20170209666

Delivery catheter for and method of delivering an implant, for example, bronchoscopically implanting a marker in a lung

Systems and methods for treating a lung of a lung of a patient. One embodiment of a method comprises positioning a leadless marker in the lung of the patient relative to the target, and collecting position data of the marker. ... Varian Medical Systems Inc

07/13/17 / #20170200276

Systems and methods for evaluating motion tracking for radiation therapy

An apparatus includes: a processor configured for obtaining a first image that corresponds with a first multi-leaf collimator (mlc) configuration, wherein the first image is generated when the mlc is stationary, obtaining a second image that corresponds with a second mlc configuration, wherein the second image is generated when the mlc and/or another component of a radiation machine is being operated to track a motion, and performing an analysis based at least in part on the first image and the second image to obtain a result; and a non-transitory medium for storing the result.. . ... Varian Medical Systems Inc

07/06/17 / #20170194124

X-ray delivery

An x-ray assembly may include a housing, an anode, and a cathode assembly. The anode may be located at least partially within the housing. ... Varian Medical Systems Inc

07/06/17 / #20170189723

Proton irradiation using spot scanning

In one embodiment of the invention, a method for irradiating a target is disclosed. A proton beam is generated using a cyclotron. ... Varian Medical Systems Inc

06/29/17 / #20170182336

Energy degrader for radiation therapy system

An energy degrading device for attenuating energy of a particle beam with reduced emittance growth. An energy degrader comprises an emittance control material that can preferentially scatter the beam particles that is incident on a surface with a shallow angle. ... Varian Medical Systems Inc

06/15/17 / #20170169984

Antiwetting coating for liquid metal

Technology is described for an antiwetting coating attached to a substrate (e.g., metal substate) on a liquid metal container. In one example, the liquid metal container includes a first enclosure member, a second enclosure member, liquid metal, and an antiwetting coating. ... Varian Medical Systems Inc

05/11/17 / #20170128750

Imaging based calibration systems, devices, and methods

Systems, devices, and methods for imaging-based calibration of radiation treatment couch position compensations.. . ... Varian Medical Systems Inc

04/06/17 / #20170098308

Systems and methods for detecting camera defect caused by exposure to radiation

A method of detecting camera defect includes: obtaining an image by a processing unit, the processing unit having a surface fit module, a subtraction module, and a peak quantification module; determining a first autocorrelation map for a first sub-region in the image; determining, using the surface fit module, a first surface fit for first scene content in the first sub-region; subtracting, using the subtraction module, the first surface fit from the first autocorrelation map for the first sub-region in the image to obtain a first residual map; and quantifying, using the peak quantification module, a first noise in the first residual map.. . ... Varian Medical Systems Inc

04/06/17 / #20170097757

Systems and methods for generating workflow outputs

A system generally includes at least one computing device having a user interface and a display interface. The computing device is configured to generate at least one desktop that can be viewed by a user via the display interface and to access a plurality of functionality modules that are each configured to receive at least one radiotherapy parameter. ... Varian Medical Systems Inc

04/06/17 / #20170097425

High dqe imaging device

An imaging device includes: a scintillator layer; and an array of photodiode elements; wherein the scintillator layer is configured to receive radiation that has passed through the array of photodiode elements. An imaging device includes: a scintillator layer having a plurality of scintillator elements configured to convert radiation into photons; and an array of photodiode elements configured to receive photons from the scintillator layer, and generate electrical signals in response to the received photons; wherein at least two of the scintillator elements are separated by an air gap. ... Varian Medical Systems Inc

04/06/17 / #20170097424

Methods for fabricating pixelated scintillator arrays

A method of making pixelated scintillator arrays employs a first jig comprising a plurality of recesses and a second jig comprising a plurality of recesses. A plurality of or n scintillator pixels are placed in a plurality of or n recesses of the first jig. ... Varian Medical Systems Inc

04/06/17 / #20170096612

Apparatus and method for precise application of lubricant on collimator components

A method of applying a lubricant onto a carriage box of a collimator includes: providing a mixture having a lubricant and a solvent; applying an amount of the mixture that includes a predetermined quantity of the lubricant onto a first set of guide rails at a first side of the carriage box; and removing the solvent from the mixture to leave the lubricant adhering to the surface. A kit for lubricating a collimator includes: a container housing a lubricating mixture having a lubricant mixed in a solvent; wherein a quantity of the lubricant is predetermined based, at least in part, on a first surface area of a first set of guide rails at a first side of a carriage box, a second surface area of a second set of guide rails at a second side of the carriage box, or both the first surface area and the second surface area.. ... Varian Medical Systems Inc

04/06/17 / #20170095678

Systems and methods for quantifying radiation beam conformity

A method for quantifying radiation beam conformity includes: obtaining first information regarding a prescribed aperture; obtaining second information regarding an actual aperture defined by components of a collimator; and determining, using a processing unit, a metric based on the first information regarding the prescribed aperture and the second information regarding the actual aperture, wherein the metric indicates an amount of over-exposed aperture area, an amount of under-exposed aperture area, or both, and wherein the processing unit comprises one or more input for receiving the first and second information, and comprises a metric determination module configured to determine the metric based on the first information and the second information.. . ... Varian Medical Systems Inc

04/06/17 / #20170095677

Systems and methods for treating a skin condition using radiation

A medical device for treating a skin of a patient includes: a radiation source configured to provide radiation; a collimator coupled to the radiation source; and an optical device for viewing a target area on the skin when a distal end of the medical device is covering the skin. A method of treating a skin of a patient includes: providing a treatment device having a distal end, a radiation source, and a collimator, wherein the distal end is configured for placement over the skin of the patient so that the skin of the patient is covered by the distal end of the treatment device; and providing an image of a target on the skin when the distal end of the treatment device is covering the skin of the patient.. ... Varian Medical Systems Inc

04/06/17 / #20170095312

Markers including magnetic transponders with increased radiographic visibility

A wireless marker including a magnetic transponder employs a high-z material to improve the visibility of the marker in radiographic images and the electrical performance of the marker for tracking with a tracking system. The magnetic transponder includes a ferromagnetic core and a coil of a conductive wire comprising the high-z material around the ferromagnetic core. ... Varian Medical Systems Inc

04/06/17 / #20170095201

Methods and apparatus for the planning and delivery of radiation treatments

Methods and apparatus are provided for planning and delivering radiation treatments by modalities which involve moving a radiation source along a trajectory relative to a subject while delivering radiation to the subject. In some embodiments the radiation source is moved continuously along the trajectory while in some embodiments the radiation source is moved intermittently. ... Varian Medical Systems Inc

04/06/17 / #20170095197

Patient setup using respiratory gated and time resolved image data

A method for patient setup includes: obtaining a first two-dimensional movie having a first plurality of image frames; obtaining a first plurality of two-dimensional images; and displaying the first plurality of two-dimensional images together with the image frames from the first two-dimensional movie in an overlay configuration and in a synchronized manner, wherein the act of displaying is performed during a patient setup procedure. A method for patient setup includes: obtaining a plurality of three-dimensional images; obtaining a first two-dimensional movie having a first plurality of image frames; determining a first plurality of two-dimensional images from the plurality of three-dimensional images; and displaying the first plurality of two-dimensional images together with the image frames from the first two-dimensional movie in an overlay configuration and in a synchronized manner, wherein the act of displaying is performed during a patient setup procedure.. ... Varian Medical Systems Inc

03/30/17 / #20170091387

Clinical goal treatment planning and optimization

An apparatus for developing an intensity-modulated radiation therapy treatment plan includes a memory that stores machine instructions and a processor that executes the machine instructions to receive a clinical goal associated with the treatment plan as a user input. The processor further executes the machine instructions to determine a plan objective based on the clinical goal, generate a cost function comprising a term based on the plan objective, and assign an initial value to a parameter associated with the term. ... Varian Medical Systems Inc

03/30/17 / #20170090042

Method for fabricating pixelated scintillators

In a method of making pixelated scintillators, an amorphous scintillator material in a molten state is pressed into a plurality of cavities defined by a plurality of walls of a mesh array. The molten scintillator material in the plurality of cavities is cooled to form a pixelated scintillator array. ... Varian Medical Systems Inc

03/30/17 / #20170087389

Method and device for efficiently irradiating a target from multiple irradiation angles in a particle therapy system

A control system is described which provides a user interface that displays a clear graphical representation of relevant data for a particle radiation therapy system (such as a pencil-beam proton therapy system) for treating multiple beam fields as efficiently as possible. The user interface allows a user to visualize a treatment session, select one or multiple beam fields to include in one or more beam applications, and dissociate beam fields previously grouped if necessary. ... Varian Medical Systems Inc

03/30/17 / #20170087388

Apparatus and method for employing a multi-leaf collimator while administering a radiation dose

These teachings provide for administering a radiation treatment plan to a patient in a single radiation treatment session using a multi-leaf collimator that is comprised of pairs of selectively movable collimating leaves. By one approach this comprises administering a sequential plurality of modulated radiation doses to the patient, where the sequential plurality of modulated radiation doses comprises at least a substantial majority of a planned total radiation dose for the radiation treatment session and where each modulated radiation dose is administered while modulating a radiation beam with the multi-leaf collimator using a curtain pattern (or, perhaps more typically, a plurality of curtain patterns).. ... Varian Medical Systems Inc

03/30/17 / #20170087387

Method and apparatus to employ a multi-layer multi-leaf collimator when administering a radiation therapy treatment

A control circuit administers a radiation treatment plan that specifies a planned total radiation dose for a radiation treatment session for a given patient by modulating a radiation beam with at least one high-resolution aperture that is formed using one of a plurality of linearly-sequential high-resolution aperture possibilities. By one approach the foregoing comprises modulating the radiation beam using at least substantially only high-resolution apertures that are formed using a plurality of the linearly-sequential high-resolution aperture possibilities. ... Varian Medical Systems Inc

03/30/17 / #20170087385

Accounting for imaging-based radiation doses

A radiation-treatment plan to treat a treatment target in a given patient takes into account imaging-based dosing of that patient by, for example, automatically accounting for radiation dosing of the given patient that results from imaging to determine at least one physical position of the given patient when forming the radiation-treatment plan. These teachings are particularly beneficial when applied in application settings where the aforementioned imaging comprises obtaining images using megavoltage-sourced radiation. ... Varian Medical Systems Inc

03/30/17 / #20170087384

Method and apparatus for using a multi-layer multi-leaf collimation system

A multi-layer multi-leaf collimation system includes at least a first layer of collimation leaves that are vertically offset with respect to a second layer of collimation leaves. A control circuit generates a preliminary radiation treatment plan using a model of a radiation therapy treatment platform using a single-layer multi-leaf collimation system following which the control circuit generates a final radiation treatment plan that takes into account at least a second layer of collimation leaves. ... Varian Medical Systems Inc

03/30/17 / #20170087383

Radiation therapy treatment planning and usage

A control circuit forms a radiation therapy treatment plan. By one approach this comprises displaying a structure dose volume histogram on a display and detecting when a user directly manipulates the displayed structure dose volume histogram. ... Varian Medical Systems Inc

03/30/17 / #20170087382

Apparatus and method using automatic generation of a base dose

A control circuit forms a radiation therapy treatment plan by automatically generating a base dose that references dosing information from multiple sources and then using that base dose to optimize a radiation therapy treatment plan. That radiation therapy treatment plan is then used to administer radiation therapy to a patient. ... Varian Medical Systems Inc

03/23/17 / #20170084359

Multileaf collimator assembly with reduced extra-focal leakage

A multileaf collimator assembly employs one or more static blocks to significantly reduce extra focal leakage or out of field dose. The multileaf collimator assembly includes a plurality of pairs of beam shaping leaves. ... Varian Medical Systems Inc

03/23/17 / #20170084041

Automatic quality checks for radiotherapy contouring

Systems, devices, methods, and computer processing products for automatically checking for errors in segmentation (contouring) using heuristic and/or statistical evaluation methods.. . ... Varian Medical Systems Inc

03/23/17 / #20170084030

Shape similarity measure for body tissue

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. ... Varian Medical Systems Inc

03/23/17 / #20170080254

Dosimetric end-to-end verification devices, systems, and methods

Dosimetrical end-to-end quality assurance devices, systems, and methods for radiation devices using x-ray imaging, optical surface imaging, and electromagnetic navigational systems to position the quality assurance device either absolute or relative in space.. . ... Varian Medical Systems Inc

03/23/17 / #20170080253

Systems, methods, and devices for high-energy irradiation

A high-energy radiation treatment system can comprise a laser-driven accelerator system, a patient monitoring system, and a control system. The laser-driven accelerator system, such as a laser-driven plasma accelerator or a laser-driven dielectric microstructure accelerator, can be constructed to irradiate a patient disposed on a patient support. ... Varian Medical Systems Inc

03/23/17 / #20170079610

Automatice exposure control for x-ray imaging

In an x-ray imaging method, the acquisition of a signal image is split off into acquisition of two or more subimages or frames. The first subimage may be acquired with an exposure of a low dose followed by a readout cycle. ... Varian Medical Systems Inc

03/16/17 / #20170072223

Radiation shields for linac head and system

In a method of constructing a head shield for a radiation machine, the angular distribution of radiation propagating from a source and the angular function of thickness of a material in attenuating the radiation to a certain level of its original value are determined. Based on the angular distribution of radiation from the source and the angular function of thickness of the material, the thicknesses of the material at a plurality of angular locations around the source and distances from the source can be calculated for attenuating the radiation to or less than a predetermined threshold value. ... Varian Medical Systems Inc

03/16/17 / #20170072221

Knowledge based multi-criteria optimization for radiotherapy treatment planning

A method of generating a treatment plan for treating a patient with radiotherapy, the method includes obtaining a plurality of sample plans, which are generated by use of a knowledge base comprising historical treatment plans and patient data. The method also includes performing a multi-criteria optimization based on the plurality of sample plans to construct a pareto frontier, where the plurality of sample plans are evaluated with at least two objectives measuring qualities of the plurality of sample plans such that treatment plans on the constructed pareto frontier are pareto optimal with respect to the objectives. ... Varian Medical Systems Inc

03/16/17 / #20170072220

Knowledge-based spatial dose metrics and methods to generate beam orientations in radiotherapy

A system for estimating a dose from a radiation therapy plan includes a memory that stores machine-readable instructions and a processor communicatively coupled to the memory, the processor operable to execute the instructions to subdivide a representation of a volume of interest into voxels. The processor also determines distances between a planned radiation field origin and each respective voxel. ... Varian Medical Systems Inc

03/02/17 / #20170056687

Memory and apparatus pertaining to the automated calculation of supplemental patient volume information

A control circuit that operably couples to a memory having a radiation-treatment plan stored therein that is based upon a particular patient volume receives subsequent information regarding that particular patient volume and automatically uses that subsequent information to calculate supplemental patient volume information to be used by the radiation-treatment plan. By one approach this supplemental patient volume information comprises replacement information to be used in lieu of the presumed patient volume information. ... Varian Medical Systems Inc

03/02/17 / #20170055931

Methods and systems for image artifacts reduction

One example method to reduce image artifacts, which may include obtaining measured projection data acquired using an imaging system. The measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system. ... Varian Medical Systems Inc

02/16/17 / #20170043181

Methods and apparatus for the planning and delivery of radiation treatments

Methods for planning delivery of radiation dose to a target region within a subject comprise: initializing a first plurality of control points located on a trajectory, the trajectory comprising relative movement between a radiation source and the subject, wherein initializing the first plurality of control points comprises assigning, to each the first plurality of control points, one or more axis positions which specify a position of the radiation source relative to the subject; specifying a second plurality of control points along the trajectory, the second plurality of control points comprising a larger number of control points than the first plurality of control points; and iteratively optimizing a stimulated dose distribution over the second plurality of control points to thereby determine a radiation delivery plan by assigning each of the second plurality of control points optimized values for one or more radiation delivery parameters.. . ... Varian Medical Systems Inc

02/09/17 / #20170036039

System and methods for processing images to measure collimator jaw and collimator performance

Systems and methods are proposed for accurate and efficient automatic measurement of jaw and leaf positioning in multi-leaf collimator imaging systems. Specifically, the method enables the automated and objective processing of images to determine characteristics of collimator jaws and mlc leaves. ... Varian Medical Systems Inc

01/26/17 / #20170021192

Radiation therapy treatment plan improvement through use of a knowledge base

A method for determining a radiation therapy dose distribution includes selecting a treatment type from a database. An organ at risk (oar) distance to target map is determined. ... Varian Medical Systems Inc

01/19/17 / #20170014648

Systems and methods for patient position monitoring

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 the plurality of positions based at least in part on a result of the act of comparing.. . ... Varian Medical Systems Inc

01/12/17 / #20170011546

Methods and systems for three-dimensional visualization of deviation of volumetric structures with colored surface structures

Embodiments of the present disclosure are directed to methods and computer systems for converting datasets into three-dimensional (“3d”) mesh surface visualization, displaying the mesh surface on a computer display, comparing two three-dimensional mesh surface structures by blending two primary different primary colors to create a secondary color, and computing the distance between two three-dimensional mesh surface structures converted from two closely-matched datasets. For qualitative analysis, the system includes a three-dimensional structure comparison control engine that is configured to convert dataset with three-dimensional structure into three-dimensional surfaces with mesh surface visualization. ... Varian Medical Systems Inc

01/05/17 / #20170004267

Methods and systems for radiotherapy treatment planning

Example methods and systems for determining a treatment plan for a radiotherapy treatment system to deliver radiotherapy treatment to a patient are disclosed. In one embodiment, the method may comprise performing a particle transport simulation to initiate a first set of particle histories and a second set of particle histories from a radiation source of the radiotherapy treatment system to a treatment volume with multiple voxels representing an anatomy of the patient. ... Varian Medical Systems Inc

01/05/17 / #20170001038

Methods and apparatus for the planning and delivery of radiation treatments

Systems for planning delivery of radiation dose to a target region within a subject comprise a processor configured to: initialize a first plurality of control points located on a trajectory, the trajectory comprising relative movement between a radiation source and the subject, wherein initializing the first plurality of control points comprises assigning, to each the first plurality of control points, one or more axis positions which specify a position of the radiation source relative to the subject; specify a second plurality of control points along the trajectory, the second plurality of control points comprising a larger number of control points than the first plurality of control points; and iteratively optimize a simulated dose distribution over the second plurality of control points to thereby determine a radiation delivery plan by assigning each of the second plurality of control points optimized values for one or more radiation delivery parameters.. . ... Varian Medical Systems Inc

01/05/17 / #20170001037

Methods and apparatus for the planning and delivery of radiation treatments

Systems for planning delivery of radiation dose to a target region within a subject comprise a processor configured to: iteratively optimize a simulated dose distribution relative to a set of one or more optimization goals comprising a desired dose distribution in the subject over a first plurality of control points located on a trajectory, the trajectory comprising relative movement between a treatment radiation source and the subject; reach one or more initial termination conditions, and after reaching the one or more initial termination conditions: specify a second plurality of control points along the trajectory, the second plurality of control points comprising a larger number control points than the first plurality of control points; and iteratively optimize a simulated dose distribution relative to the set of one or more optimization goals over the second plurality of control points to thereby determine a radiation delivery plan.. . ... Varian Medical Systems Inc

01/05/17 / #20170001036

Methods and apparatus for the planning and delivery of radiation treatments

Methods for planning delivery of radiation dose to a target region within a subject comprise: iteratively optimizing a simulated dose distribution relative to a set of one or more optimization goals comprising a desired dose distribution in the subject over a first plurality of control points located on a trajectory, the trajectory comprising relative movement between a radiation source and the subject; reaching one or more initial termination conditions, and after reaching the one or more initial termination conditions: specifying a second plurality of control points along the trajectory and comprising a larger number control points than the first plurality of control points; and iteratively optimizing a simulated dose distribution relative to the set of one or more optimization goals over the second plurality of control points to thereby determine a radiation delivery plan.. . ... Varian Medical Systems Inc

01/05/17 / #20170001035

Methods and apparatus for the planning and delivery of radiation treatments

Systems for delivering radiation dose to a target area within a subject comprise: a radiation source for outputting a radiation beam; a support for supporting the subject; a movement mechanism for moving the radiation source relative to the subject along a trajectory; and a controller configured to cause, according to a radiation delivery plan: the radiation source to deliver the radiation beam to the subject while causing the movement mechanism to effect relative movement between the radiation source and the subject along the trajectory; and the radiation source to vary an intensity of the radiation beam by varying a radiation output rate of the radiation source according to the radiation delivery plan over at least a portion of the trajectory while causing the movement mechanism to effect relative movement between the radiation source and the subject, to thereby deliver dose to the subject according to the radiation delivery plan.. . ... Varian Medical Systems Inc

01/05/17 / #20170001034

Methods and apparatus for the planning and delivery of radiation treatments

Methods for delivering radiation dose to a target area within a subject comprise: defining a trajectory comprising relative movement between a treatment radiation source and the subject and determining a radiation delivery plan; and, while effecting relative movement between the treatment radiation source and the subject along the trajectory, delivering a treatment radiation beam from the treatment radiation source to the subject according to the radiation delivery plan to impart a dose distribution on the subject. Delivering the treatment radiation beam from the treatment radiation source to the subject comprises varying an intensity of the treatment radiation beam over at least a portion of the trajectory. ... Varian Medical Systems Inc

01/05/17 / #20170001033

Methods and apparatus for the planning and delivery of radiation treatments

Systems for delivering radiation dose to a target area within a subject comprise: a radiation source for outputting a radiation beam; a support for supporting the subject; a movement mechanism for moving the radiation source relative to the subject along a trajectory; one or more sensors for monitoring a position of the subject; and a controller configured, in accordance with a radiation delivery plan, to: determine the position from one or more signals received from the one or more sensors; deactivate delivery of the treatment radiation beam upon determining that the position is outside of an acceptable range; and reactivate delivery of the treatment radiation beam upon determining that the position is within the acceptable range, to thereby deliver dose to the subject according to the radiation delivery plan.. . ... Varian Medical Systems Inc








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