| 摘要 |
An organism (12) is irradiated with therapeutic radiation from a radiation irradiation device (40). A pair of two-dimensional radiation detectors (30-1, 30-2) are arranged so as to face one another with the irradiated therapeutic radiation passing therebetween, and detect the two-dimensional positions irradiated by a pair of annihilation ³ rays produced when a positron emitted from a positron-emitting radionuclide is annihilated. On the basis of a pair of positions detected by the pair of two-dimensional radiation detectors (30-1, 30-2), a radionuclide position detecting unit (32) detects the position of the positron-emitting radionuclide, and the radiation irradiation device (40) irradiates the position of the positron-emitting radionuclide with therapeutic radiation. |
