System and method for high resolution radiation field shaping
First Claim
1. A radiation treatment system including:
- a radiation source which emits radiation energy;
a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter;
wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and
wherein the multi-leaf collimator includes a first set of leaves which provide for a first area of the shape that has a step resolution length in the range of approximately 3.0 mm or less and wherein the multi-leaf collimator is positioned such that there is a clearance in range approximately 400 mm or greater between the multi-leaf collimator and the isocenter; and
wherein the step resolution length corresponds to a length dimension of a dose calculation matrix.
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Accused Products
Abstract
A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape.
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Citations
34 Claims
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1. A radiation treatment system including:
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a radiation source which emits radiation energy; a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter; wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and wherein the multi-leaf collimator includes a first set of leaves which provide for a first area of the shape that has a step resolution length in the range of approximately 3.0 mm or less and wherein the multi-leaf collimator is positioned such that there is a clearance in range approximately 400 mm or greater between the multi-leaf collimator and the isocenter; and wherein the step resolution length corresponds to a length dimension of a dose calculation matrix. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radiation treatment system including:
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a radiation source which emits radiation energy; a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter; wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and wherein the multi-leaf collimator includes a first set of leaves which provide for a first area of the shape that has a step resolution length in the range of approximately 3.0 mm or less and wherein the multi-leaf collimator is positioned such that there is a clearance in range approximately 400 mm or greater between the multi-leaf collimator and the isocenter; and wherein the step resolution length corresponds to a whole number integer multiple of a unit length dimension of a dose calculation matrix.
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8. A radiation treatment system including:
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a radiation source which emits radiation energy; a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter; wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and wherein the multi-leaf collimator includes a first set of leaves which provide for a first area of the shape that has a step resolution length in the range of approximately 3.0 mm or less and wherein the multi-leaf collimator is positioned such that there is a clearance in range approximately 400 mm or greater between the multi-leaf collimator and the isocenter; and wherein the step resolution length corresponds to a length dimension of a dose calculation matrix, and wherein the multi-leaf collimator includes a second set of leaves which provide for a second area of the shape that has a second step resolution length, and the second step resolution length corresponds to a whole number integer multiple of the length dimension of the dose calculation matrix, and the whole number integer is a number greater than one. - View Dependent Claims (9)
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10. A radiation treatment system including:
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a radiation source which emits radiation energy; a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter; wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and wherein at least a first area of the shape has a first step resolution length in the range of approximately 3.0 mm or less and, wherein the first step resolution length corresponds to a length dimension of a dose calculation matrix. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A radiation treatment system including:
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a radiation source which emits radiation energy; a multi-leaf collimator positioned between the radiation source and an isocenter, such that a portion of the radiation energy from the radiation source is transmitted through the multi-leaf collimator to the isocenter; wherein the multi-leaf collimator includes a plurality of leaves, each leaf being movable to allow a selected portion of the radiation energy to be blocked, whereby a shape is defined by the portion of radiation energy which is incident at the isocenter, and the shape is controlled by a positioning of the plurality of leaves; and wherein at least a first area of the shape has a first step resolution length in the range of less than approximately 3.0 mm or less and the first step resolution length corresponds to a whole number integer multiple of a length dimension of a dose calculation matrix. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification