Patent ID: 6512813
Filing Date: 2003-01-28
Classification: A61B,A61N,G21K

Abstract:
An apparatus for general radiotherapeutic application including radiosurgery, comprising(a) a source carrier for supporting an array of radiation sources, said source carrier adapted for rotation about a first axis, (b) a collimating structure for directing radiation flux emanating from each said radiation source radially inward along a respective collimator axis through a radiation flux limiting aperture toward a substantially common locus on said first axis, said collimating structure adapted for angular displacement in relation to said source carrier about said first axis characterized in that said radiation sources are distributed within a narrow azimuthal region of about 20Â° to 72Â° about said first axis and a sub-array of radiation flux limiting apertures is provided for each said radiation source and the several sub-arrays are adapted to selectably align one such flux limiting aperture with each said radiation source, whereby a plurality of different solid angles for each said radiation source may be selected.