US 7,573,978 B2
Variable feathering field splitting for intensity modulated fields of large size
Srijit Kamath, Gainesville, Fla. (US); Sartaj Kumar Sahni, Gainesville, Fla. (US); Jonathan Li, Gainesville, Fla. (US); Jatinder Palta, Gainesville, Fla. (US); and Sanjay Ranka, Gainesville, Fla. (US)
Assigned to University of Florida Research Foundation, Inc., Gainesville, Fla. (US)
Appl. No. 11/995,303
PCT Filed Jul. 11, 2006, PCT No. PCT/US2006/026891
§ 371(c)(1), (2), (4) Date Jan. 10, 2008,
PCT Pub. No. WO2007/008899, PCT Pub. Date Jan. 18, 2007.
Claims priority of provisional application 60/698043, filed on Jul. 11, 2005.
Prior Publication US 2008/0240348 A1, Oct. 02, 2008
Int. Cl. A61N 5/10 (2006.01)
U.S. Cl. 378—65  [378/152] 9 Claims
OG exemplary drawing
 
1. A method of delivering intensity-modulated radiation therapy (IMRT) using variable feathering field splitting for intensity modulated fields of large size, comprising the steps of:
(a) providing an intensity matrix for the treatment of a patient, said intensity matrix having a plurality of rows and columns for spanning a prescribed radiation field including a prescribed field width;
(b) comparing said prescribed width to a maximum field width provided by a radiation treatment system;
(c) splitting said intensity matrix into a plurality of spatially overlapping intensity submatrices when said prescribed width exceeds said maximum field width, wherein said splitting comprises variably feathering said intensity matrix, and
(d) providing radiotherapy to said patient using a leaf sequencing method applied to a beam-shaping device to generate said submatrices.