Programmable particle scatterer for radiation therapy beam formation
First Claim
1. A charged particle beam scatterer/range modulator comprising:
- high Z material having an adjustable path length in a particle beam path;
low Z material having an adjustable path length in the particle beam path; and
a programmable controller that independently adjusts the high Z and low Z path lengths during exposure of a target to the beam.
5 Assignments
0 Petitions
Accused Products
Abstract
Interposing a programmable path length of one or more materials into a particle beam modulates scattering angle and beam range in a predetermined manner to create a predetermined spread out Bragg peak at a predetermined range. Materials can be “low Z” and “high Z” materials that include fluids. A charged particle beam scatterer/range modulator can comprise a fluid reservoir having opposing walls in a particle beam path and a drive to adjust the distance between the walls of the fluid reservoir under control by a programmable controller. A “high Z” and, independently, a “low Z” reservoir, arranged in series, can be used. When used for radiation treatment, the beam can be monitored by measuring beam intensity, and the programmable controller can adjust the distance between the opposing walls of the “high Z” reservoir and, independently, the distance between the opposing walls of the “low Z” reservoir according to a predetermined relationship to integral beam intensity. Beam scattering and modulation can be done continuously and dynamically during a treatment in order to deposit dose in a target volume in a predetermined three dimensional distribution.
69 Citations
69 Claims
-
1. A charged particle beam scatterer/range modulator comprising:
-
high Z material having an adjustable path length in a particle beam path;
low Z material having an adjustable path length in the particle beam path; and
a programmable controller that independently adjusts the high Z and low Z path lengths during exposure of a target to the beam. - View Dependent Claims (2, 3, 4)
-
-
5. A radiation treatment apparatus, comprising:
-
a source of charged particles that provides a charged particle beam; and
a charged particle beam scatterer/range modulator, that includes high Z material having an adjustable path length in a particle beam path;
low Z material having an adjustable path length in the particle beam path; and
a programmable controller that independently adjusts the high Z and low Z path lengths during exposure of a target to the beam. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of scattering and/or modulating a range of a changed particle beam, comprising:
-
directing a charged particle beam through a high Z material having an adjustable path length in a particle beam path;
directing the charged particle beam through a low Z material having an adjustable path length in the particle beam path; and
independently adjusting the high Z and low Z path lengths during exposure of a target to the beam under control by a programmable controller. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. A method of treating a patient by directing a charged particle beam at a target within said patient, comprising:
-
producing a charged particle beam;
directing the charged particle beam through a high Z material having an adjustable path length in a particle beam path;
directing the charged particle beam through a low Z material having an adjustable path length in the particle beam path; and
independently adjusting the high Z and low Z path lengths during exposure of a target to the beam under control by a programmable controller. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
-
26. A charged particle beam scatterer/range modulator comprising:
-
a fluid reservoir having opposing walls in a particle beam path;
a drive to adjust the distance between the walls of the fluid reservoir; and
a programmable controller for the drive to adjust the distance between the walls of the reservoir during exposure of a target to the beam. - View Dependent Claims (27, 28, 29, 30, 31)
-
-
32. A radiation treatment apparatus, comprising:
-
a source of charged particles that provides a charged particle beam; and
a charged particle beam scatterer/range modulator that includes a fluid reservoir having opposing walls in a particle beam path;
a drive to adjust the distance between the walls of the reservoir; and
a programmable controller for the drive to adjust the distance between the walls of the reservoir during exposure of a target to the beam. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
-
-
42. A method of treating a patient by directing a charged particle beam at a target within said patient, comprising:
-
producing a charged particle beam;
directing the charged particle beam through a fluid reservoir having opposing walls in a particle beam path;
adjusting the distance between opposing walls of the fluid reservoir during exposure of a target to the beam under control of a programmable controller. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
-
-
50. A radiation treatment apparatus, comprising:
-
a synchrocyclotron that provides a charged particle beam; and
a charged particle beam scatterer/range modulator, that includes high Z material in an extraction channel of the synchrocyclotron having an adjustable path length in a particle beam path;
low Z material in an extraction channel of the synchrocyclotron having an adjustable path length in the particle beam path; and
a programmable controller that independently adjusts the high Z and low Z path lengths during exposure of a target to the beam. - View Dependent Claims (51, 52, 53, 54, 55)
-
-
56. A method of scattering and/or modulating a range of a changed particle beam, comprising:
-
producing a particle beam in a synchrocyclotron;
directing the charged particle beam through a high Z material having an adjustable path length in a particle beam path and disposed in an extraction channel of the synchrocyclotron;
directing the charged particle beam through a low Z material having an adjustable path length in the particle beam path and disposed in the extraction channel of the synchrocyclotron; and
independently adjusting the high Z and low Z path lengths during exposure of a target to the beam under control by a programmable controller. - View Dependent Claims (57, 58, 59, 60, 61)
-
-
62. A radiation treatment apparatus, comprising:
-
a synchrocyclotron that provides a charged particle beam; and
a charged particle beam scatterer/range modulator that includes a fluid reservoir disposed in an extraction channel of the synchrocyclotron and having opposing walls in a particle beam path;
a drive to adjust the distance between the walls of the reservoir; and
a programmable controller for the drive to adjust the distance between the walls of the reservoir during exposure of a target to the beam. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69)
-
Specification