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US 5,317,164 AGranted
Radiotherapy device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorMasaaki Kurokawa
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Abstract
A radiotherapy device includes: a linac 1 for generating an electron beam 9, and a thin guide tube 2 for guiding the electron beam from the linac 1 to the affected part 7 within the body of the patient 6. The orbit of the electron beam 9 is controlled by means of the feedback circuit 8 in response to the output of the deviation detector 6 which detects the leakage of the electron beam outside of the guide tube 2. A high-level dosage can be accomplished without incurring danger of radiation exposure on the operator.
Claims7
A radiotherapy device comprising:
- radiation generation means for generating an electron beam;
- a guide tube of a small diameter attached at one end thereof to said radiation generation means, wherein said guide tube is adapted to be inserted at another end thereof into a body of a patient, said guide tube guiding said electron beam from said radiation generation means to said body of said patient;
- electron beam convergence means disposed along said guide tube, for converting said electron beam into a thin beam directed to an affected part of said body of said patient;
- deviation detector means for detecting a deviation of said electron beam from a center of said guide tube;
- and
- feedback control means coupled to said deviation detector means, for controlling said electron beam convergence means to adjust an orbit of said electron beam along a central axis of said guide tube in response to an output of said deviation detector means.
3 more elements
Dependencies are inferred from the claim text.