Patent ID: 8641592

Claim:
A radiation machine for treating a patient having prostate or pelvic lesions, comprising: an irradiator defining a hollow interior, and including, a barrel-shaped three-layer shell structure having a circular axial cross-section and an arcuate sagittal cross-section defining a hollow interior, said shell structure having three separate layers including an innermost collimator layer, an outermost shield layer, and a middle source layer, a plurality of radiation sources arranged in one or more rows inside the middle source layer of said shell structure along the sagittal arc of said irradiator to provide a plurality of radiation beams traversing the hollow interior of said irradiator in a fan geometry of radiation that converges from said sagittal arc to a focal point in said patient having pelvic or prostate lesions, a plurality of collimators in the innermost collimator layer of said shell structure, each of said plurality of collimators being aligned with a corresponding one of said plurality of radiation sources for directing its radiation beam to the said focal point, the outermost shield layer of said three-layer shell structure comprising a radiation shield to block the plurality of radiation beams from leaking outwards, a dynamic patient support system within the hollow interior of said irradiator; and an annular 3D imaging scanner having a circular axial cross-section defining a hollow interior and physically coaxially connected to said irradiator for guidance of radiation delivery.