INTENSITY MODULATED THREE-DIMENSIONAL RADIATION SCANNING METHOD AND APPARATUS
First Claim
1. An apparatus configured to control a charged particle beam for irradiation of a tumor of a patient, comprising:
- a synchrotron configured with an extraction foil, wherein a timing controller times the charged particle beam striking said extraction foil in an acceleration period in said synchrotron resulting in extraction of the charged particle beam at a selected energy;
a raster beam scanning system configured to scan the charged particle beam across delivery positions while both (1) constantly delivering the charged particle beam at and between the delivery positions and (2) simultaneously varying said selected energy level of the charged particle beam across the delivery positions.
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Accused Products
Abstract
The invention relates to treatment of solid cancers and more particularly to a method and apparatus correlating proton beam intensity with proton delivery efficiency, optionally in a raster beam scanning system. The system induces betatron oscillation on the proton beam causing the beam to traverse an extraction material resulting in slowed protons and a feedback current proportional to the proton flux. A controller receives the desired intensity from an irradiation plan and the feedback current and adjusts the radio-frequency field in the radio-frequency cavity system to yield an intensity of the proton beam that matches the desired intensity from the irradiation plan. Preferably, the intensity of the proton beam correlates with radiation delivery efficiency. The system preferably operates in conjunction with a multi-field charged particle cancer therapy system, with charged particle beam injection, particle beam acceleration, multi-axis charged particle beam control, and/or targeting methods and apparatus.
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Citations
20 Claims
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1. An apparatus configured to control a charged particle beam for irradiation of a tumor of a patient, comprising:
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a synchrotron configured with an extraction foil, wherein a timing controller times the charged particle beam striking said extraction foil in an acceleration period in said synchrotron resulting in extraction of the charged particle beam at a selected energy; a raster beam scanning system configured to scan the charged particle beam across delivery positions while both (1) constantly delivering the charged particle beam at and between the delivery positions and (2) simultaneously varying said selected energy level of the charged particle beam across the delivery positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20)
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14. A method for controlling a charged particle beam for irradiation of a tumor of a patient, comprising the steps of:
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a timing controller timing a synchrotron configured with an extraction foil, said timing controller timing the charged particle beam to strike said extraction foil in an acceleration period in said synchrotron resulting in extraction of the charged particle beam at a selected energy; a raster beam scanning system scanning the charged particle beam across delivery positions while both (1) constantly delivering the charged particle beam at and between the delivery positions and (2) simultaneously varying said selected energy level of the charged particle beam across the delivery positions.
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Specification