| 摘要 |
PROBLEM TO BE SOLVED: To improve the picture quality of a CT image (tomogram) in the form of CT fluoro-radiography without intensifying the intensity of X-rays. SOLUTION: At the time of CT fluoro-radiography, this X-ray CT device, linked with the designation of the CT fluoro-radiographic form, supply-apply voltage for a proportional counting operation area as a bias voltage to a multichannel type gas X-ray detector from a variable type stabilizing power source 14 to improve detecting sensitivity. As a result, though an incident X-ray quantity to the detector 3 is small, the signal intensity of transmitting X-ray detection data is made sufficiently larger than the noise of a trailing amplifier to improve the S/N ratio of an image signal to improve the image quality of a CT image in the CT fluoro-radiographic form.
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