X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1992-04-22
1993-11-30
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Absorption
378113, 378137, 2504923, A61N 510
Patent
active
052672948
ABSTRACT:
In order to construct a radiotherapy apparatus which can irradiate a point in the body of a patient in an optional direction with high accuracy, an accelerated electron beam is controlled electrically by using deflectors so as to irradiate a plurality of radioactive ray generating positions, a collimator is provided so that a radioactive ray generated from the positions can irradiate one point of a portion of the patient's body to be treated, and a gantry can be rotated mechanically.
REFERENCES:
patent: 4726046 (1988-02-01), Nunan
patent: 4827491 (1989-05-01), Barish
patent: 5117829 (1992-06-01), Miller et al.
Kuroda Katsuhiro
Nishimura Masatoshi
Hitachi Medical Corporation
Porta David P.
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