System and Method for Planning a Radiation Therapy Treatment
First Claim
1. A method for planning a radiation therapy treatment of a body represented by a volume of voxels, comprising:
- determining a radiation dose matrix representing a spatial distribution of a radiation dose of beams of radiation irradiating the volume with homogeneous stopping power, wherein the beams are collimated and are shifted copies of each other at each depth of the volume, wherein the spatial distribution is determined by calculating cumulative beam-axial doses in a single matrix-matrix multiplication and redistributing the cumulative beam-axial doses to all voxels in the volume using a convolution; and
applying a set of correcting operations to the radiation dose matrix to produce a cumulative voxel radiation dose of the volume, wherein each correcting operation is linear, independent from another correcting operation and has a transform, wherein steps of the method are performed by at least one processor.
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Abstract
A method for planning a radiation therapy treatment of a body represented by a volume of voxels determines a radiation dose matrix representing a spatial distribution of a radiation dose of beams of radiation irradiating the volume with homogeneous stopping power. The beams are collimated and are shifted copies of each other at each depth of the volume, and the spatial distribution is determined by calculating cumulative beam-axial doses in a single matrix-matrix multiplication and redistributing the cumulative beam-axial doses to all voxels in the volume using a convolution. Next, a set of correcting operations is applied to the radiation dose matrix to produce a cumulative voxel radiation dose of the volume. Each correcting operation is linear, independent from another correcting operation and has a transform.
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Citations
12 Claims
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1. A method for planning a radiation therapy treatment of a body represented by a volume of voxels, comprising:
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determining a radiation dose matrix representing a spatial distribution of a radiation dose of beams of radiation irradiating the volume with homogeneous stopping power, wherein the beams are collimated and are shifted copies of each other at each depth of the volume, wherein the spatial distribution is determined by calculating cumulative beam-axial doses in a single matrix-matrix multiplication and redistributing the cumulative beam-axial doses to all voxels in the volume using a convolution; and applying a set of correcting operations to the radiation dose matrix to produce a cumulative voxel radiation dose of the volume, wherein each correcting operation is linear, independent from another correcting operation and has a transform, wherein steps of the method are performed by at least one processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for planning a radiation therapy treatment of a body represented by a volume of voxels, comprising:
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determining a radiation dose matrix representing a spatial distribution of a radiation dose of a regular 3D grid of beams irradiating the volume with homogeneous stopping power; and applying a set of correcting operations to the radiation dose matrix to produce a cumulative voxel radiation dose of the volume, wherein the set of correcting operation includes one or combination of an operation for correcting an assumption of uniformity of lateral distribution of energy of each collimated beam, an operation for correcting an assumption of the homogeneous stopping power of the volume, an operation for correcting an assumption of a parallel distribution of the collimated beams, an operation for correcting an assumption of a multi-port propagation of the collimated beams, and an operation for correcting an assumption for a cumulative stopping power of media between a beam source and the patient, wherein each correcting operation is linear, independent from another correcting operation and has a transform, and wherein steps of the method are performed by a parallel processor.
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12. A radiation therapy system comprising a parallel processor for determining an approximation of a radiation dose matrix representing a spatial distribution of a radiation dose of beams of radiation irradiating a body represented by a volume of voxels, wherein the spatial distribution is determined by calculating cumulative beam-axial doses in a single matrix-matrix multiplication and redistributing the cumulative beam-axial doses to all voxels in the volume using a convolution, and for correcting the approximation using a set of linear correcting operations.
Specification