| 摘要 |
PROBLEM TO BE SOLVED: To improve a quality of an image by calculating an image signal of tomogram plane from a radiation directional signal depending on a relative displacement and an electric signal from a flat plane detector obtained based on radiation scanning and using a signal relating to a central rotation point of radiation scanning stored in a memory for calculation of the imaging signal. SOLUTION: A signal treating device 4 has a calculation unit 16 and memories 17-19. Target interval signals are stored in the memory 17. It is estimated that these signals are produced on a radiation receiver by injection of a test body 12 when it is imaged without any hindrance. The calculation unit 16 conducts comparison to an actual interval signal delivered from the radiation receiver and produces a correcting signal for disappearance of difference between the actual interval signal and the target interval signal. These correcting signals are stored in the memory 18. Furthermore, in order to correct aperture diameter contact phenomenon, the correcting signals are made from the difference between an actual signal level and a target signal level and stored in the memory 19.
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