Antonelli, Terry, Stout & Kraus
Radiotherapy apparatus
 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. 
Hitachi Medical Corporation
A
A61N
inventional
Masatoshi Katsuhiro
Nishimura Kuroda