High definition radiation treatment with an intensity modulating multi-leaf collimator
First Claim
1. A method for delivering radiation from a radiation source to a treatment area utilizing a multi-leaf collimator, comprising:
- positioning the multi-leaf collimator between the radiation source and the treatment area to block a portion of the radiation, with leaves of the multi-leaf collimator extending longitudinally along a first axis and being positioned to define a first treatment field;
delivering radiation to said first treatment field;
rotating the multi-leaf collimator about a central axis extending generally perpendicular to a plane containing at least a portion of the leaves;
positioning the leaves to define a second treatment field; and
delivering radiation to said second treatment field;
wherein positioning the leaves comprises intersecting a periphery edge of the target area at a transverse edge of each of the leaves at a predetermined location based on the number of treatment fields.
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Accused Products
Abstract
A method for delivering radiation from a radiation source to treatment a area utilizing a multi-leaf collimator. The method includes positioning the multi-leaf collimator between the radiation source and the object to block a portion of the radiation. The leaves of the multi-leaf collimator are generally located within a plane and extend longitudinally along a first axis. The leaves are positioned to define a first treatment field. The method further includes delivering radiation to the first treatment field and rotating the multi-leaf collimator about a central axis extending generally perpendicular to the leaf plane. The leaves are positioned to define a second treatment field and radiation is delivered to the second treatment field
160 Citations
18 Claims
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1. A method for delivering radiation from a radiation source to a treatment area utilizing a multi-leaf collimator, comprising:
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positioning the multi-leaf collimator between the radiation source and the treatment area to block a portion of the radiation, with leaves of the multi-leaf collimator extending longitudinally along a first axis and being positioned to define a first treatment field;
delivering radiation to said first treatment field;
rotating the multi-leaf collimator about a central axis extending generally perpendicular to a plane containing at least a portion of the leaves;
positioning the leaves to define a second treatment field; and
delivering radiation to said second treatment field;
wherein positioning the leaves comprises intersecting a periphery edge of the target area at a transverse edge of each of the leaves at a predetermined location based on the number of treatment fields. - View Dependent Claims (2, 3, 4, 5)
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6. A method for delivering radiation from a radiation source to a treatment area utilizing a multi-leaf collimator, comprising:
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positioning the multi-leaf collimator between the radiation source and the treatment area to block a portion of the radiation, with leaves of the multi-leaf collimator extending longitudinally along a first axis and being positioned to define a first treatment field;
delivering radiation to said first treatment field;
rotating the multi-leaf collimator about a central axis extending generally perpendicular to a plane containing at least a portion of the leaves;
positioning the leaves to define a second treatment field; and
delivering radiation to said second treatment field;
wherein positioning the leaves to define said second treatment field comprises intersecting a periphery edge of the target area at a transverse edge of each of the leaves at a position spaced one-third times the width of the leaf from a longitudinal edge of the leaf. - View Dependent Claims (7, 8)
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9. A method for delivering radiation from a radiation source to a treatment area utilizing a multi-leaf collimator, comprising:
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dividing said treatment area into a plurality of cells each having a defined treatment intensity level;
grouping the cells to form a plurality of matrices, each of the matrices having at least one dimension approximately equal to a width of the collimator leaf;
decomposing each of the matrices into orthogonal matrices to identify a plurality of treatment fields;
positioning the multi-leaf collimator between the radiation source and the treatment area to block a portion of the radiation, with leaves of the multi-leaf collimator extending longitudinally along a first axis and being positioned to define a first treatment field;
delivering radiation to said first treatment field;
rotating the multi-leaf collimator about a central axis extending generally perpendicular to a plane containing at least a portion of the leaves;
positioning the leaves to define a second treatment field; and
delivering radiation to said second treatment field. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for delivering radiation from a radiation source to a treatment area utilizing a multi-leaf collimator, comprising:
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dividing the treatment area into two or more sections, the area being divided along a line extending generally perpendicular to a direction of travel of the leaves;
positioning the multi-leaf collimator between the radiation source and the treatment area to block a portion of the radiation, with leaves of the multi-leaf collimator extending longitudinally along a first axis and being positioned to define a first treatment field;
delivering radiation to said first treatment field;
rotating the multi-leaf collimator about a central axis extending generally perpendicular to a plane containing at least a portion of the leaves;
positioning the leaves to define a second treatment field; and
delivering radiation to said second treatment field. - View Dependent Claims (16, 17, 18)
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Specification