To provide a radiotherapy apparatus for performing radiation therapy by suppressing the destruction of tissues of an affected area.
A grid 16 where a plurality of slits 50 with a width of 25 μm, which prevents the destruction of the tissues of the affected area by radiation, are formed is arranged on the side of a radiation source of the affected area 18 of a patient, and the affected area 18 of the patient is irradiated with the radiation transmitted through the grid 16. The radiation therapy is performed by suppressing the destruction of the tissues of the affected area since the grid 16 where the plurality of transmission parts of a prescribed width that prevents the destruction of the tissues of the affected area by the radiation are formed is arranged in a position immediately before the incidence of the radiation on the affected area of the patient, and the affected area of the patient is irradiated with the radiation transmitted through the grid.
KUWABARA TAKAO
Kato Kazunori
Hiroshi Fukuda
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