Method and apparatus for radiation therapy

Details Method and apparatus for radiation therapy Method and apparatus for radiation therapy

A - Human Necessities

61

N

A61N 5/10 (2006.01) A61B 6/00 (2006.01) A61B 6/03 (2006.01) A61N 5/01 (2006.01) G21K 1/04 (2006.01) G21K 5/04 (2006.01) G21K 5/10 (2006.01)

Patent

CA 2091275

A radiation therapy apparatus includes a compensator having a plurality of leaves to divide the radiation beam into rays each of which may be effectively and individually attenuated over a range of attenuations by controlling the duty cycle of the leaves position between the open and closed states. An apparatus for controlling the compensator accounts for scattering of radiation through the deconvolution of a terma map and calculates a sinogram for controlling the compensator at a variety of angles about a patient using iterated forward and back projections efficiently calculated in frequency space.

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