| 摘要 |
<p>PURPOSE:To simultaneously obtain a plurality of tomographic images, by a method wherein the detectors of a ring type radiation tomography apparatus (an ECT apparatus) are arranged so as to shift the positions thereof in a slice thickness direction and two kinds of collimators are made exchangeable while the ring-shaped arrangement of the detectors is constituted from only one layer. CONSTITUTION:A collimator 2 wherein a plurality of scintillators 1 are arranged in a ring shape so as to mutually shift the positions thereof in the slice thickness direction of an object, for example, a head part 5 and radioactive rays from a radioactive isotope (RI) administered in a patient's body and accumulated in the specific organ are incident only to the part superposed in the slice thickness direction of each scintillator 1 and a collimator 3 wherein said superposed part is shielded and radioactive rays are incident only to the non-superposed part are provided so as to be made exchangeable and tomographic images of the slice surfaces 6, 9, 10 are respectively obtained while simply exchanging both of them corresponding to a purpose. In a addition, a positron releasable nuclide is used while radioactive rays incident onto the oblique line passing the openings 7, 8 of the collimator 3 of the scintillator 1 are detected and the tomographic image of the slice surface 11 is obtained to simultaneoulsy obtain a three-layered tomographic image.</p> |
