Radiant energy – Irradiation of objects or material – Ion or electron beam irradiation
Patent
1997-09-05
1999-08-31
Anderson, Bruce C.
Radiant energy
Irradiation of objects or material
Ion or electron beam irradiation
2504921, 378 65, H01J 3700
Patent
active
059456841
ABSTRACT:
An apparatus controls a stereotactic radiosurgery dose applied to an object being treated by a linear accelerator mounted on a gantry. The linear accelerator is capable of generating a beam having a path and a beam centerline, directed toward the object, and the beam is capable of having a plurality of angular positions relative to the object. The apparatus includes a turntable that is rotatable about an axis of rotation and defines a plurality of openings passing therethrough. Each opening has a center and receives therein a beam collimator of a preselected size. The turntable is disposed so that each of the plurality of openings may be rotated to where the center of the opening is coincident with the beam centerline, thereby allowing the beam to pass therethrough. A drive rotates the turntable about the axis of rotation and a sensor determines the angular position of the beam relative to the object. A controller that is responsive to the angular position determining sensor controls the turntable rotating drive so that as the angular position of the beam relative to the object changes, a preselected collimator is in the path of the beam.
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Physics Original Contribution entitled Treatment Planning Optimization for ultiple Arcs Stereotactic Radiosurgery Using a Linear Accelerator Chan F. Lam, Ph.D, J.G. Zhu, M.Sc., Jimmy O. Feen, Ph.D. and Joseph M. Jenrette, III, M.D., pub. May 12, 1995.
Lam Chan F.
Nelson Stephen J.
Anderson Bruce C.
Medical University of South Carolina Foundation of Research Deve
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