Treatment planning method and apparatus for radiosurgery and radiation therapy
First Claim
1. A radiosurgery treatment planning method for simulating radiation treatment of tumorous tissue, comprising the steps of:
- mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model having a curvature;
distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation;
positioning at least several isocenter points in a distributed manner so that they can be superimposed upon said model of said mapped tumorous tissue requiring irradiation;
simulating radiation beams passing through said isocenter points; and
determining which regions of said tumorous tissue received said predetermined dose of radiation by identifying first cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon said simulating step, received a maximum number of radiation beams passing therethrough.
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Abstract
Disclosed is a method and system for inverse planning of radiosurgery of tumors. Isocenter points are replaced systematically throughout a model of a tumor to generate a sequence of simulated radiation beams. This crossing geometry and intersection pattern of these beams is then computed. Through fine tuning of certain variables used in the calculations in accordance with the present invention, radiosurgery is planned in a manner which avoids over irradiation of healthy tissue and critical regions, and allows for homogeneity of dose inside the tumor. The method of the present invention allows for exact decision about the feasibility of use-defined dose distributions.
79 Citations
31 Claims
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1. A radiosurgery treatment planning method for simulating radiation treatment of tumorous tissue, comprising the steps of:
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mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model having a curvature; distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation; positioning at least several isocenter points in a distributed manner so that they can be superimposed upon said model of said mapped tumorous tissue requiring irradiation; simulating radiation beams passing through said isocenter points; and determining which regions of said tumorous tissue received said predetermined dose of radiation by identifying first cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon said simulating step, received a maximum number of radiation beams passing therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radiosurgery treatment planning method for simulating radiation treatment of tumorous tissue, comprising the steps of:
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mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model; distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation; simulating radiation beams; identifying first cells formed by simulating the crossing of said simulated radiation beams within said model of said tumorous tissue which, upon simulated treatment, receive a maximum number of radiation beams passing therethrough; and identifying second cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon simulated treatment, received a minimum number of radiation beams passing therethrough. - View Dependent Claims (14, 15, 16)
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17. A radiosurgery treatment planning apparatus for simulating radiation treatment of tumorous tissue, comprising:
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means for mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model having a curvature; means for distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation; means for positioning at least several isocenter points in a distributed manner so that they can be superimposed upon said model of said mapped tumorous tissue requiring irradiation; means for simulating radiation beams passing through said isocenter points; and means for determining which regions of said tumorous tissue received said predetermined dose of radiation through the identification of first cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon said simulation of radiation beams, received a maximum number of simulated radiation beams passing therethrough. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A radiosurgery treatment planning apparatus for simulating radiation treatment of tumorous tissue, comprising:
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means for mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model; means for distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation; means for generating simulated radiation beams; means for identifying first cells formed by crossing said simulated radiation beams within said model of said tumorous tissue which, upon simulated treatment, receive a maximum number of radiation beams passing therethrough; and means for identifying second cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon simulated treatment, received a minimum number of radiation beams passing therethrough. - View Dependent Claims (29, 30, 31)
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Specification