X-ray detector for proton transit detection apparatus and method of use thereof
First Claim
1. A method for probing a tumor of a patient using positively charged particles, comprising the steps of:
- sequentially delivering from an output nozzle, connected to a first beam transport line, to the patient;
a first set of the positively charged particles comprising a first mean energy; and
a second set of the positively charged particles comprising a second mean energy, the second mean energy at least two megaelectronVolts different from the first mean energy;
after transmission through the patient, sequentially detecting;
a first residual energy of the first set of the positively charged particles; and
a second residual energy of the second set of the positively charged particles; and
determining a water equivalent thickness of a probed path of the patient using the first residual energy and the second residual energy.
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Abstract
The invention comprises a method and apparatus for probing a tumor of a patient using positively charged particles, comprising the steps of: (1) sequentially delivering sets of varied and known positively charged particles to a patient; (2) after transmission through the patient, sequentially detecting a residual energy of each of the sets of positively charged particles; and (3) determining a water equivalent thickness of a probed path of the patient using a plot of the detector response as a function of residual energy that is fit with a curve. The analyzer relates a half maximum of the fit curve, such as a Gaussian curve, to the water equivalent thickness of the sampled beam path. Repeated measurements as a function of incident angle and/or position of the incident charged particles allows generation of an image of the sample, such as a computed tomography image.
389 Citations
18 Claims
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1. A method for probing a tumor of a patient using positively charged particles, comprising the steps of:
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sequentially delivering from an output nozzle, connected to a first beam transport line, to the patient; a first set of the positively charged particles comprising a first mean energy; and a second set of the positively charged particles comprising a second mean energy, the second mean energy at least two megaelectronVolts different from the first mean energy; after transmission through the patient, sequentially detecting; a first residual energy of the first set of the positively charged particles; and a second residual energy of the second set of the positively charged particles; and determining a water equivalent thickness of a probed path of the patient using the first residual energy and the second residual energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for probing a tumor of a patient using positively charged particles, comprising:
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a beam transport line connected to an output nozzle configured to deliver to the patient;
(1) a first set of the positively charged particles comprising a first mean energy and (2) a second set of the positively charged particles comprising a second mean energy, the second mean energy at least two megaelectronVolts different from the first mean energy;a detector positioned on an opposite side of said output nozzle from a patient position, said detector configured to sequentially detect;
(1) a first residual energy of the first set of the positively charged particles and (2) a second residual energy of the second set of the positively charged particles; anda controller configured to determine a water equivalent thickness of a probed path of the patient using the first residual energy and the second residual energy. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification