Varian Medical Systems, Inc.

Flavio Poehlmann-Martins

Amir Shojaei

Reza Alibazi Behbahani

William Thompson Main

Philip Adamson

Ognian Sabev

Joshua McNEUR

Alexander Cahill

A radiation system includes a patient station including a plurality of accelerator systems and a microwave generation system configured to generate microwaves for the plurality of accelerators. The plurality of accelerators are configured to provide substantially simultaneous multiple radiation beams from the plurality of accelerators. The microwave generation system includes a plurality of radio frequency (RF) sources, each RF source being configured to generate separate microwave signals for corresponding respective ones of the plurality of accelerator systems, and a plurality of modulators, each modulator being configured to modulate generation of the separate microwave signals by the respective ones of the plurality of RF sources. The respective ones of the plurality of RF sources and plurality of modulators are included in a respective plurality of RF chains, each RF chain including a respective circulator and dose rate servo.

Movable/replaceable high intensity target and multiple accelerator systems and methods

Presented systems and methods facilitate efficient and effective generation and delivery of radiation. In one embodiment, a radiation generation component includes a high intensity target that produces Bremsstrahlung radiation in response to impacts by charged particles, wherein the high intensity target is configured with operating limitations based primarily on catastrophic failure mechanisms rather than fatigue failure mechanisms. The high intensity target is configured to be compatible with a loading system of a radiation generation system. The high intensity target can have a catastrophic failure strain percentage in the range of 0.5 to 4.0 percent. The catastrophic failure mechanisms can include at least one selected from the group comprising ultimate tensile strength, fracture strain, and melting point. The high intensity target can have a product life in a low cycle fatigue regime range. The high intensity target can comprise a material with a melting temperature in the range of 800 C. to 3,700 C. The high intensity target can be configured to load in an accelerator enclosure. The high intensity target can include an identification feature. The Bremsstrahlung radiation can correspond to average dose rates greater than 1.0 greys per second (Gy/s).

A radiation dose rate monitor system includes an emitting electrode configured to be impinged by radiation radiation; a collecting electrode configured to form an electrical circuit with said emitting electrode, a current measurement device configured to measure a current through said emitting and collecting electrodes indicative of a dose of said radiation radiation, and a chamber enclosing a gas. Emission of secondary electrons from the emitting electrode provides a majority of the current.

Dose rate monitor, system and method

An apparatus includes an ion chamber and a valve assembly. The ion chamber may include a housing enclosing a gas and one or more electrodes. The valve assembly is coupled to the ion chamber allowing control of replacement of the gas within the housing.

Refillable ion chamber with automated purging system

Presented systems and methods enable efficient and effective radiation treatment planning and treatment, including accurate and convenient transmission of the radiation towards a tissue target. In one embodiment, a radiation system includes a particle source, a bremsstrahlung target, and a pinhole collimator. The particle source is configured to produce a particle beam (e.g., an electron beam, etc.). The bremsstrahlung target is configured to receive the particle beam and generate a photon radiation beam. The received particle beam and generated photon radiation beam can correspond to an inflected image. The inflected image can be associated with a tumor/tissue target. The pinhole collimator is configured to receive the photon radiation beam in a pattern that corresponds to the inflected image, invert the photon radiation beam pattern, and forward the results towards a tissue target.

Pinhole collimator systems and methods

Presented systems and methods facilitate efficient and effective generation and delivery of radiation. In one embodiment, an accelerator system includes a particle source, an acceleration portion, a high intensity target, and a target location control component. The particle source is configured to generate charged particles. The acceleration portion is configured to accelerate the charged particles. The high intensity target is configured to generate Bremsstrahlung radiation in response to impact by the charged particles. The target location control component configured to change the location of charged particle impacts on the high intensity target. In one exemplary implementation the change of location of charged particle impact is based on thermal diffusion and said location of charged particle impacts is moved at a rate greater than a rate of diffusion of detrimental heat impacts on the high intensity target.

A radiotherapy dose rate monitor system includes an emitting electrode configured to be impinged by radiotherapy radiation; a collecting electrode configured to form an electrical circuit with said emitting electrode, a current measurement device configured to measure a current through said emitting and collecting electrodes indicative of a dose of said radiotherapy radiation, and a chamber enclosing a gas. Emission of secondary electrons from the emitting electrode provides a majority of the current.

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Fremont, CA, United States of America

Flavio Poehlmann-Martins