| 摘要 |
PROBLEM TO BE SOLVED: To enable uses in various styles and increase compatibility with various photography systems by providing two 1st and 2nd gamma-ray detection parts of the same constitution in the same structure. SOLUTION: The 1st and 2nd gamma-ray detection parts 1 and 2 have semiconductor sensors 3 which detect gamma rays and output them as electric signals and are provided with collimators 5 limiting the incidence directions of the gamma rays on their gamma-ray incidence sides, and at the output of each semiconductor sensor 3, a preamplifier 7, an analog-digital converter 9, and an energy spectrum gathering part 11 are provided. For an energy spectrum corrected by a waveform processing part 13 of a main body as required, a wave height analysis part 15 finds the total of counted values in a window of interest corresponding to an object isotope. An image processing part 17 reconstitutes the living body distribution of the gamma rays as image data according to the total counted value and position information on the semiconductor sensors 3 and complements the data in conformity with the matrix size of an image display part 23. Then a light and shade display of the living body distribution of the gamma rays is made at the image display part 23 thorugh an image memory 19 and a data processing part 21.
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