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.
申请公布号
US5528650(A)
申请公布日期
1996.06.18
申请号
US19940191243
申请日期
1994.02.02
申请人
SWERDLOFF, STUART;MACKIE, THOMAS R.;HOLMES, TIMOTHY
发明人
SWERDLOFF, STUART;MACKIE, THOMAS R.;HOLMES, TIMOTHY