A Platform for Intensity Modulated Radiation Therapy
AssigneeThe Regents of the University of California
InventorsKe SHENG, Dan NGUYEN, Dan RUAN
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Abstract
In certain embodiments novel sparse orthogonal collimators (SOCs) for use in radiotherapy are provided. In certain embodiments the SOCs comprise 2 layer 4 bank orthogonal collimators with 2-8 leaves in each of the 4 banks. Instead of using the limited heuristic approach to create jaw-only IMRT, a novel fluence map optimization method is provided based on wavelet decomposition and this method is used for IMRT. An algorithm to simplify the fluence maps with minimal and predictable dose quality compromise is also provided.
Claims61
A sparse orthogonal collimator for shaping a radiotherapy beam, said collimator comprising
- first bank of individually longitudinally movable elongate leaves, and a second bank of individually longitudinally movable elongate leaves the second bank being disposed in an opposed relationship to the first bank;
- third bank of individually longitudinally movable elongate leaves, and a fourth bank of individually longitudinally movable elongate leaves the fourth bank being disposed in an opposed relationship to said third bank;
- and
- said first bank and said second bank being oriented orthogonal to said third bank and fourth bank;
- and
- said first bank, second bank, third bank, and fourth bank each individually contain from two to four leaves.
Dependencies are inferred from the claim text.