X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate
2006-07-11
2009-08-11
Yun, Jurie (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Absorption
C378S152000
Reexamination Certificate
active
07573978
ABSTRACT:
A method and associated system300for delivering intensity-modulated radiation therapy (IMRT) uses variable feathering field splitting for intensity modulated fields of large size. A processor controls a beam-shaping device that splits the radiation beam into a plurality of radiation fields delivered to a patient. The processor in cooperation with the beam-shaping device implements a variable feathering method which includes providing an intensity matrix for the treatment of a patient, the intensity matrix having a plurality of rows and columns for spanning a prescribed radiation field including a prescribed field width. The prescribed width is compared to a maximum field width provided by the radiation treatment system. The intensity matrix is split into a plurality of spatially overlapping intensity submatrices by variably feathering the intensity matrix when the prescribed width exceeds the maximum field width, Radiotherapy is then provided to the patient using a leaf sequencing method to generate the submatrices.
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Kamath Srijit
Li Jonathan
Palta Jatinder
Ranka Sanjay
Sahni Sartaj Kumar
Saliwanchik Lloyd & Saliwanchik
University of Florida Research Foundation Inc.
Yun Jurie
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