Charged particle cancer therapy beam state determination apparatus and method of use thereof
First Claim
1. A method for determination of a state of positively charged particles of a charged particle beam entering a patient along a beam path, comprising the steps of:
- using a beam transport system to transport the positively charged particles from a synchrotron to an exit nozzle,a slideably insertable beam insert positioned proximate said exit nozzle;
reshaping the charged particle beam using the beam insert;
positioning a first imaging sheet in the beam path between said beam insert and the patient; and
imaging first photons emitted from said first imaging sheet using a detector system, wherein, resultant from transmission of the positively charged particles transmitting through said first imaging sheet, said first imaging sheet emits the first photons;
positioning a second imaging sheet in the beam path between said first imaging sheet and the patient; and
imaging second photons emitted from said second imaging sheet using said detector system, wherein, resultant from transmission of the positively charged particle transmitting through said second imaging sheet, said second imaging sheet emits the second photons; and
further comprising the step of;
verifying direction of the beam path against a radiation treatment plan using two signals from said detector system, said two signals comprising a first position signal representative of a first location of the first photons emitted from said first imaging sheet and a second position signal representative of a second location of the second photons emitted from the second imaging sheet.
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Accused Products
Abstract
The invention comprises an apparatus and method of use thereof for determining a charged particle beam state after passage through a final beam modification insert and prior to entering a patient, such as in cancer treatment or tomographic imaging. The insert comprises a range shifter, a known energy absorber, a ridge filter, a focal length altering insert, an aperture defining element, a compensator, and/or a patient specific beam modifier. The monitoring element comprises one or more sheets, configured to emit photons upon passage therethrough of the charged particle beam, where the emitted photons are detected, tested, such as against a predetermined cancer treatment plan, and/or used to aid in three dimensional tomographic image generation.
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Citations
17 Claims
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1. A method for determination of a state of positively charged particles of a charged particle beam entering a patient along a beam path, comprising the steps of:
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using a beam transport system to transport the positively charged particles from a synchrotron to an exit nozzle, a slideably insertable beam insert positioned proximate said exit nozzle; reshaping the charged particle beam using the beam insert; positioning a first imaging sheet in the beam path between said beam insert and the patient; and imaging first photons emitted from said first imaging sheet using a detector system, wherein, resultant from transmission of the positively charged particles transmitting through said first imaging sheet, said first imaging sheet emits the first photons; positioning a second imaging sheet in the beam path between said first imaging sheet and the patient; and imaging second photons emitted from said second imaging sheet using said detector system, wherein, resultant from transmission of the positively charged particle transmitting through said second imaging sheet, said second imaging sheet emits the second photons; and
further comprising the step of;verifying direction of the beam path against a radiation treatment plan using two signals from said detector system, said two signals comprising a first position signal representative of a first location of the first photons emitted from said first imaging sheet and a second position signal representative of a second location of the second photons emitted from the second imaging sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for determination of a state of positively charged particles of a charged particle beam entering a patient along a beam path, comprising:
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a beam transport system configured to transport the positively charged particles from a synchrotron to an exit nozzle; a slideably insertable beam insert positioned proximate said exit nozzle; a first imaging sheet positioned in the beam path between the beam insert and the patient during use; and a detector system configured to image said first imaging sheet, said first imaging sheet configured to emit first photons upon transmission of the positively charged particles through said first imaging sheet; a second imaging sheet positioned between said first imaging sheet and the patient during use, said first imaging sheet at least one centimeter from said second imaging sheet in the beam path, said second imaging sheet configured to locally emit second photons upon passage of the positively charged particles; and verifying direction of the beam path against a radiation treatment plan using two signals from said detector system, said two signals comprising a first position signal representative of a first location of the first photons emitted from said first imaging sheet and a second position signal representative of a second location of the second photons emitted from the second imaging sheet. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus for determination of a state of positively charged particles of a charged particle beam entering a patient along a beam path, comprising:
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a beam transport system configured to transport the positively charged particles from a synchrotron to an exit nozzle; a slideably insertable beam insert positioned proximate said exit nozzle; a first imaging sheet positioned in the beam path between the beam insert and the patient during use; and a detector system configured to image said first imaging sheet, said first imaging sheet configured to emit first photons upon transmission of the positively charged particles through said first imaging sheet; and further comprising; a second imaging sheet positioned between said first imaging sheet and said tomographic imaging detection element, said second imaging sheet configured to emit second photons upon transmission of the positively charged particles through said second imaging sheet; and verifying direction of the beam path against a radiation treatment plan using two signals from said detector system, said two signals comprising a first position signal representative of a first location of the first photons emitted from said first imaging sheet and a second position signal representative of a second location of the second photons emitted from the second imaging sheet. - View Dependent Claims (17)
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Specification