METHOD AND SYSTEM FOR DYNAMICALLY-TRIMMED SPOT SCANNING FOR ION THERAPY
First Claim
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1. A spot scanning (SS) ion therapy system, comprising:
- a. an ion therapy source comprising at least one scanning magnet, the ion therapy source configured to sequentially direct a particle pencil beam to a number of spot positions in a target;
b. a dynamic trimming collimator configured to be mounted downstream of the at least one scanning magnet of the ion therapy source, the dynamic trimming collimator comprising;
i. at least one trimmer located downstream of the at least one scanning magnet and configured to intercept a portion of said pencil beam; and
ii. at least one driving mechanism configured for moving said at least one trimmer; and
c. a controller configured to control the ion therapy source to execute the sequence of spot irradiations by sequentially directing and delivering the particle pencil beam to the number of spot positions in the target and control the position of said at least one trimmer as a function of each of said number of spot positions.
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Abstract
A spot scanning (SS) ion therapy system configured for dynamic trimming of an ion particle pencil beam to reduce the amount of the radiation dosage outside of a target boundary.
34 Citations
33 Claims
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1. A spot scanning (SS) ion therapy system, comprising:
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a. an ion therapy source comprising at least one scanning magnet, the ion therapy source configured to sequentially direct a particle pencil beam to a number of spot positions in a target; b. a dynamic trimming collimator configured to be mounted downstream of the at least one scanning magnet of the ion therapy source, the dynamic trimming collimator comprising; i. at least one trimmer located downstream of the at least one scanning magnet and configured to intercept a portion of said pencil beam; and ii. at least one driving mechanism configured for moving said at least one trimmer; and c. a controller configured to control the ion therapy source to execute the sequence of spot irradiations by sequentially directing and delivering the particle pencil beam to the number of spot positions in the target and control the position of said at least one trimmer as a function of each of said number of spot positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30)
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17. A dynamic trimming collimator comprising:
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a. at least one trimmer configured to limit spillage of radiation from a two-dimensional scanning ion beam; and b. at least one driving mechanism configured for moving the at least one trimmer;
wherein the dynamic trimming collimator is capable of being mounted downstream an ion therapy source configured to produce the two-dimensional scanning ion beam in a sequence to a number of spot positions in a target, and wherein the dynamic trimming collimator is capable of controlling the position of said at least one trimmer to limit spillage of radiation of the two-dimensional scanning ion beam at said target as a function for each of the number of spot positions. - View Dependent Claims (18, 22, 31, 32, 33)
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Specification