Varian Medical Systems Patent Grants

Method and apparatus pertaining to the optimization of radiation-treatment plans using automatic changes to treatment objectives

Granted: August 15, 2017
Patent Number: 9731147
Optimization of a radiation-delivery treatment plan can be facilitated by permitting the making of automatic changes to one or more treatment objectives. This can comprise processing radiation-delivery treatment plan parameters with respect to one or more predetermined treatment objectives and then automatically changing that predetermined treatment objective to provide one or more changed treatment objectives (including altered, deleted, and/or added treatment objectives) that can then…

Method and apparatus to provide corrections for a radiation-therapy beam

Granted: August 8, 2017
Patent Number: 9726477
Information is provided regarding a block's sectional contour in a particular plane as corresponds to a radiation-therapy beam. For a point at which block effects are to be assessed, a point is projected onto a plane of the block and a plurality of straight lines is then formed. Each line has a particular relationship with respect to the projected point (such as having each such line intersect all others at the projected point). Intersections amongst these straight lines and the contour…

Knowledge-based automatic image segmentation

Granted: August 8, 2017
Patent Number: 9727975
A method for medical image segmentation includes accessing and updating a knowledge-base. A medical image is received and a sparse landmark signature is computed based on the medical image. Either a representative or a cohort average reference image set is selected. A portion of either representative reference image set or the cohort average reference image set is deformed to generate mappings to the medical image set. A segmentation for each structure of interest of the medical image…

Low-power imager with autosensing function

Granted: July 11, 2017
Patent Number: 9706146
An imager includes a flat panel configured to collect charges when the imager operates in a full-power charge integration mode. The imager switches to a low-power standby mode immediately after each image acquisition in the full-power charge integration mode. Bias current flowing through the flat panel is monitored in the standby mode. The imager switches to the full-power charge integration mode when detecting a change in the bias current indicating onset of an X-ray exposure.

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687673
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…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687674
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…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687675
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…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687676
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,…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687677
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;…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: June 27, 2017
Patent Number: 9687678
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…

Integrated radiation therapy systems and methods for treating a target in a patient

Granted: June 20, 2017
Patent Number: 9682253
An integrated radiation therapy process comprises acquiring first objective target data related to a parameter of a target within a patient by periodically locating a marker positioned within the patient using a localization modality. This method continues with obtaining second objective target data related to the parameter of the target by periodically locating the marker. The first objective target data can be acquired in a first area that is apart from a second area which contains a…

Method for interactive manual matching and real-time projection calculation in imaging

Granted: June 6, 2017
Patent Number: 9672640
Methods and systems are proposed herein for performing manual matching of generated digitally reconstructed radiographs with acquired verification images efficiently without intensive processing and/or memory consumption or hardware requirements. According to one aspect of the claimed subject matter, a system is provided that includes a computing workstation, communicatively coupled to both a data storage device and an image acquisition device. Real time images acquired by the image…

Patient positioning and support systems

Granted: May 30, 2017
Patent Number: 9662256
A patient support system includes a first section and a second section which can be removably coupled to the first section. The first section is configured for attachment to a positioning system, thereby providing an interface between the removable second section and the positioning system. A combined support surface is formed when the second section is coupled to the first section.

Brachytherapy applicator

Granted: May 9, 2017
Patent Number: 9642999
Described here are brachytherapy applicators that comprise a modular support matrix. The modular support matrix may define the arrangement of radiation source lumens within the brachytherapy applicator. The modular support matrix can be adjusted to position the radiation sources to obtain a certain dose and dose profile. A series of modular support matrices may be operably connected according to patient anatomy or dosing requirements. Systems and methods for using such modular…

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

Granted: May 9, 2017
Patent Number: 9643029
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.

Method for efficient daily constancy check or calibration of proton therapy system

Granted: May 9, 2017
Patent Number: 9645255
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. Measurements of proton beams…

Methods and apparatus for the planning and delivery of radiation treatments

Granted: April 25, 2017
Patent Number: 9630025
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. Some embodiments involve the optimization of the radiation delivery plan to meet various optimization goals while…

Instruments with location markers and methods for tracking instruments through anatomical passageways

Granted: April 18, 2017
Patent Number: 9623208
Instruments and methods for tracking such instruments in a human patient. One embodiment of an instrument in accordance with the invention comprises an elongated body, such as an elongated flexible member, which has a distal section configured to be passed through a vessel or other passageway in a human. The instrument can further include a lumen through the distal section and a magnetic marker having a transponder at the distal section. The transponder includes a circuit configured to…

Integrated radiation therapy systems and methods for treating a target in a patient

Granted: April 11, 2017
Patent Number: 9616248
An integrated radiation therapy process comprises acquiring first objective target data related to a parameter of a target within a patient by periodically locating a marker positioned within the patient using a localization modality. This method continues with obtaining second objective target data related to the parameter of the target by periodically locating the marker. The first objective target data can be acquired in a first area that is apart from a second area which contains a…

Imaging based calibration systems, devices, and methods

Granted: April 11, 2017
Patent Number: 9616251
Systems, devices, and methods for imaging-based calibration of radiation treatment couch position compensations.