Charged particle cancer therapy imaging method and apparatus
First Claim
1. An apparatus for imaging a tumor of a patient, the patient having a variable respiration rate during an irradiation period, said apparatus comprising:
- a statically positioned X-ray source;
a respiration sensor configured to generate a respiration signal, said respiration signal corresponding to a respiration pattern of the patient, said respiration pattern representing the variable respiration rate of the patient;
a rotatable platform configured to both (1) support the patient and (2) rotate the patient;
means for collecting a set of X-ray images during the irradiation period, said set of X-ray images collected during a set of rotation positions of said rotatable platform, said set of rotation positions comprising at least five rotation positions covering at least ninety degrees of rotation,wherein at least five X-ray images of said set of X-ray images represent X-ray images of the patient at said at least five rotation positions of said rotatable platform, andwherein each of said five X-ray images represent a set time period of a respiration cycle occurring during one of said five rotation positions; and
a charged particle system, configured to deliver protons to the patient, said charged particle system comprising a particle beam controller configured to control an intensity controller, said intensity controller configured to use a measure of a current, resulting from the protons striking an extraction foil, as a feedback control to a radio-frequency cavity system, said charged particle system configured to use the set of X-ray images in targeting the tumor.
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Abstract
The invention relates to a method and apparatus for treatment of a solid tumor. More particularly, the invention comprises a multi-axis and/or multi-field charged particle cancer therapy system. In one embodiment, the tumor is imaged from multiple directions in phase with patient respiration. The two-dimensional images are combined to produce a three-dimensional picture of the tumor relative to patient features. The resulting three-dimensional image is used in generation of a radiation treatment plan and subsequent radiation therapy with the radiation beam in terms of control of two-dimensional beam trajectory, delivered beam energy, delivered beam intensity, and/or beam velocity each as a function of patient vertical translation position, patient rotation position, and/or patient respiration.
379 Citations
13 Claims
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1. An apparatus for imaging a tumor of a patient, the patient having a variable respiration rate during an irradiation period, said apparatus comprising:
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a statically positioned X-ray source; a respiration sensor configured to generate a respiration signal, said respiration signal corresponding to a respiration pattern of the patient, said respiration pattern representing the variable respiration rate of the patient; a rotatable platform configured to both (1) support the patient and (2) rotate the patient; means for collecting a set of X-ray images during the irradiation period, said set of X-ray images collected during a set of rotation positions of said rotatable platform, said set of rotation positions comprising at least five rotation positions covering at least ninety degrees of rotation, wherein at least five X-ray images of said set of X-ray images represent X-ray images of the patient at said at least five rotation positions of said rotatable platform, and wherein each of said five X-ray images represent a set time period of a respiration cycle occurring during one of said five rotation positions; and a charged particle system, configured to deliver protons to the patient, said charged particle system comprising a particle beam controller configured to control an intensity controller, said intensity controller configured to use a measure of a current, resulting from the protons striking an extraction foil, as a feedback control to a radio-frequency cavity system, said charged particle system configured to use the set of X-ray images in targeting the tumor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification