| 摘要 |
PURPOSE:To obtain different tomographic images without increasing the number of detector layers, by arranging a Hadamard mask on the radiant rays incidence side of each radiant rays detector, and reconstituting plural tomographic images at different positions at one-slot intervals of Hadamard masks. CONSTITUTION:Each radiant rays detector consists of a scintillator 11, light guide 12, and a photomultiplier 13. Many radiant rays detectors are arranged annularly in a ring type radiant rays detector array and Hadamard masks 14 serving as collimators are arranged inside of the array, i.e. on radiant rays incidence sides of scintillators 11. Those Hadamard masks 14 are moved, slot by slot, by one slot at right angles to tomographic images and a cyclic Hadamard matrix corresponding to the array order of the opening parts and shield parts of the Hadamard masks 14 is made to operate on detector outputs obtained at respective positions and also standardized to obtain data. |
