METHOD AND APPARATUS COORDINATING SYNCHROTRON ACCELERATION PERIODS WITH PATIENT RESPIRATION PERIODS
First Claim
1. An apparatus configured to accelerate charged particles for treatment of a patient, comprising:
- a synchrotron, comprising;
at least one bending magnet;
a winding coil power supply configured to operate at a first power level;
a first winding coil wrapped around said at least one bending magnet, said first winding coil configured to carry power from said winding coil power supply;
a correction coil power supply configured to operate at less than ten percent of said first power level; and
a correction coil wrapped around said at least one bending magnet, said correction coil configured to carry power from said correction coil power supply,wherein said correction coil, operating at less than ten percent of said first power level, allows rapid changes in energy levels of the charged particles; and
a main controller configured to alter said energy levels for each pulse of said synchrotron through control of said correction coil power supply resulting in an altered magnetic field used in control of acceleration of the charged particles in said synchrotron.
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Accused Products
Abstract
The invention relates generally to treatment of solid cancers. More particularly, the invention relates to enhancing synchrotron acceleration cycle usage efficiency by adjusting the synchrotron'"'"'s acceleration cycle to correlate with a patient'"'"'s respiration rate where efficiency refers to the duty cycle or the percentage of acceleration cycles used to deliver charged particles to the tumor. The system senses patient respiration and controls timing of negative ion beam formation, injection of charged particles into a synchrotron, acceleration of the charged particles, and extraction to yield delivery of the particles to the tumor at a predetermine period of the patient'"'"'s respiration cycle. Independent control of charged particle energy and intensity is maintained during the timed irradiation therapy. Multi-field irradiation ensures efficient delivery of Bragg peak energy to the tumor while spreading ingress energy about the tumor.
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Citations
20 Claims
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1. An apparatus configured to accelerate charged particles for treatment of a patient, comprising:
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a synchrotron, comprising; at least one bending magnet; a winding coil power supply configured to operate at a first power level; a first winding coil wrapped around said at least one bending magnet, said first winding coil configured to carry power from said winding coil power supply; a correction coil power supply configured to operate at less than ten percent of said first power level; and a correction coil wrapped around said at least one bending magnet, said correction coil configured to carry power from said correction coil power supply, wherein said correction coil, operating at less than ten percent of said first power level, allows rapid changes in energy levels of the charged particles; and a main controller configured to alter said energy levels for each pulse of said synchrotron through control of said correction coil power supply resulting in an altered magnetic field used in control of acceleration of the charged particles in said synchrotron. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for accelerating charged particles for treatment of a patient, comprising the steps of:
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a synchrotron accelerating the charged particle, said synchrotron comprising at least one bending magnet; a winding coil power supply operating at a first power level; a first winding coil wrapped around said at least one bending magnet, said first winding coil carrying power from said winding coil power supply; a correction coil power supply operating at less than ten percent of said first power level; and a correction coil wrapped around said at least one bending magnet, said correction coil carrying power from said correction coil power supply, wherein said correction coil, operating at less than ten percent of said first power level, allows rapid changes in energy levels of the charged particles; and a main controller varying said energy levels for each pulse of said synchrotron through control of said correction coil power supply resulting in an altered magnetic field used in control of acceleration of the charged particles in said synchrotron. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification