Mitsubishi Denki Kabushiki Kaisha

Nobuyuki Kanematsu

Kiyoshi Yoda

A novel radiotherapy apparatus is disclosed, comprising: a bed; an X-ray source for CT; an X-ray detector for CT; a CT rotating mechanism for supporting the CT X-ray source and the CT X-ray detector rotatably around the bed; a radioactive ray source for therapy; a collimator; and a therapy rotating mechanism for supporting the radioactive ray source and the collimator rotatably around the bed independently of the CT rotating mechanism.

Radiotherapy apparatus with independent rotation mechanisms

An irradiation dose calculating unit can solve a problem of a conventional irradiation dose calculating unit in that since irradiation doses from portals are empirically determined, it is likely that optimum irradiation doses are not established for a target and a critical organ. A prescription data input section is used for a physician to input prescription data designating doses to a target and a critical organ. First and second object function calculating sections each calculate predefined indices, and obtain a first object function representing the level of satisfaction for the critical organ and a second object function representing the level of satisfaction for the target and critical organ. The irradiation doses from the portals are calculated based on these object functions such that the prescription data are satisfied.

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Tokyo, Japan

Nobuyuki Kanematsu