System and method for optimizing radiation treatment with an intensity modulating multi-leaf collimator by minimizing junctions
AssigneeSiemens Medical Solutions USA, Inc.
InventorRamon Alfredo Carvalho Siochi
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Abstract
A system and method of the present invention for controlling radiation delivery from a radiation source to an object are disclosed. The method generally includes defining a field on the object for radiation delivery. The field includes a plurality of cells, each having a defined treatment intensity level. The cells are grouped to form a matrix having at least one dimension approximately equal to a width of a collimator leaf capable of blocking radiation emitted from the radiation source. The method further includes decomposing the matrix into orthogonal matrices and optimizing delivery of the radiation by selecting a combination of orthogonal matrices to minimize junction effects.
Claims29
A method for controlling radiation delivery from a radiation source to an object, comprising:
- defining a field on the object for radiation delivery, said field including 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 a collimator leaf capable of blocking radiation emitted from the radiation source;
- decomposing each of the matrices into orthogonal matrices;
- and
- optimizing delivery of the radiation by combining orthogonal matrices from each of the matrices and selecting a combination of orthogonal matrices to minimize junction effects.
A system for controlling radiation output to an object from a radiation source, said object having a field defined thereon for radiation delivery, said field including a plurality of cells having predefined treatment intensity levels, the system comprising:
- a collimator having multiple leaves for blocking radiation from said source and defining an opening between the radiation source and said object;
- and
- a processor for receiving the cells, grouping a portion of the cells to form a matrix having at least one dimension approximately equal to a width of one of the collimator leaves, decomposing the matrix into orthogonal matrices, and optimizing delivery of the radiation by combining orthogonal matrices from each of the matrices and selecting a combination of orthogonal matrices to minimize junction effects.
A method for controlling radiation delivery from a radiation source to an object, comprising:
- defining a field on the object for radiation delivery, said field including 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 a collimator leaf capable of blocking radiation emitted from the radiation source;
- decomposing each of the matrices into orthogonal matrices;
- and
- optimizing delivery of the radiation by shifting orthogonal matrices to relocate an isocenter relative to the matrices.
A method for defining an intensity map for use in delivering radiation from a radiation source to an object, the method comprising:
- defining a field on the object for radiation delivery, said field including a plurality of cells each having a defined treatment intensity level;
- grouping the cells to form a plurality of matrices;
- decomposing each of said matrices into orthogonal matrices;
- and
- creating an intensity map by selecting a combination of orthogonal matrices to minimize junction effects.
Dependencies are inferred from the claim text.