Device and method for outputting charged particle beam
First Claim
1. A device for outputting a charged particle beam to irradiate the charged particle beam on a target, the device comprising:
- a charged particle beam generator which generates the charged particle beam;
an irradiation device which includes a range modulation device having a thickness varying in a direction of propagation of the charged particle beam outputted from the charged particle beam generator to change the energy of the passing charged particle beam so that a spread-out Bragg peak is formed in the target to be irradiated, and which outputs the charged particle beam which passed the range modulation device to the target to be irradiated;
a dose measurement device which measures the dose of the charged particle beam at a position downstream of the range modulation device in the direction of charged particle beam propagation; and
a spread-out Bragg peak calculation device which calculates a spread-out Bragg peak based on the dose value measured by the dose measurement device.
1 Assignment
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Accused Products
Abstract
The present invention improves the accuracy of therapy by checking in real time whether an spread-out Bragg peak (SOBP) width agrees with a desired width during irradiation with a beam. The device for outputting a charged particle beam includes a charged particle beam generator 1 including a synchrotron 4; a range modulation device such as a range modulation wheel (RMW) 28 which forms a Bragg peak of an ion beam extracted from this charged particle beam generator 1; an irradiation device 16 which is located in the direction of ion beam propagation of this RMW device 28 and includes a dose monitor 31 for detecting a dose of the ion beam; and an SOBP width calculation device 73 which calculates ion beam Bragg peak formed by the RMW device 28 based on a detection value of the dose monitor 31.
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Citations
39 Claims
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1. A device for outputting a charged particle beam to irradiate the charged particle beam on a target, the device comprising:
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a charged particle beam generator which generates the charged particle beam; an irradiation device which includes a range modulation device having a thickness varying in a direction of propagation of the charged particle beam outputted from the charged particle beam generator to change the energy of the passing charged particle beam so that a spread-out Bragg peak is formed in the target to be irradiated, and which outputs the charged particle beam which passed the range modulation device to the target to be irradiated; a dose measurement device which measures the dose of the charged particle beam at a position downstream of the range modulation device in the direction of charged particle beam propagation; and a spread-out Bragg peak calculation device which calculates a spread-out Bragg peak based on the dose value measured by the dose measurement device. - View Dependent Claims (2, 3, 4, 5, 6, 15)
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7. A device for outputting a charged particle beam to irradiate the charged particle beam on a target, the device comprising:
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a charged particle beam generator which generates the charged particle beam; an irradiation device which includes a range modulation device having a thickness varying in a direction of propagation of the charged particle beam to change the energy of the passing charged particle beam so as to form a spread-out Bragg peak in the target to be irradiated, and outputs the charged particle beam which passed the range modulation device to the target to be irradiated; a dose measurement device located downstream of the range modulation device in the direction of charged particle beam propagation; and a spread-out Bragg peak judgment device which calculates a spread-out Bragg peak based on a dose measured by the dose measurement device, and determines whether the calculated spread-out Bragg peak agrees with a set width. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19)
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20. A method for outputting a charged particle beam by use of a charged particle beam generator and an irradiation device including a range modulation device, the range modulation device having a thickness varying in a direction of propagation of the charged particle beam extracted from the charged particle beam generator to change the energy of the passing charged particle beam so that a spread-out Bragg peak is formed in the target to be irradiated, the method comprising the steps of:
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measuring a dose of the charged particle beam at a position downstream of the range modulation device in the direction of the propagation of the charged particle beam; and calculating the spread-out Bragg peak based on the dose. - View Dependent Claims (21, 22, 23)
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24. A method for outputting a charged particle beam by use of a charged particle beam generator and an irradiation device including a range modulation device, the range modulation device having a thickness varying in a direction of propagation of the charged particle beam extracted from the charged particle beam generator to change the energy of the passing charged particle beam so that a spread-out Bragg peak is formed in the target to be irradiated, the method comprising the steps of:
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measuring a dose of the charged particle beam at a position downstream of the range modulation device in the direction of the propagation of the charged particle beam; and calculating the spread-out Bragg peak based on the dose and determine whether the calculated spread-out Bragg peak agrees with a set width. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A device for outputting a charged particle beam to irradiate the charged particle beam on a target, the device comprising:
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a charged particle beam generator which generates the charged particle beam; an irradiation device having a range modulation device which outputs the charged particle beam, which has passed through the range modulation device, to the target to be irradiated; a time calculation device which calculates a time when the charged particle beam passes the range modulation wheel; and a spread-out Bragg peak calculation device which calculates a spread-out Bragg peak width based on the time when the charged particle beam passes the range modulation device calculated by the time calculation device. - View Dependent Claims (31, 32, 33)
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34. A method for outputting a charged particle beam by use of a charged particle beam generator and an irradiation device including a range modulation device, the method comprising the steps of:
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calculating a time when the charged particle beam passes the range modulation device; and calculating a spread-out Bragg peak width based on the time when the charged particle beam passes the beam energy moderator. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification