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[Performance evaluation of X-ray CT using visible scintillation light].

Kiyoyuki Kodama·Minoru Hamada·Tamotsu Suzuki·Masatoshi Hashimoto·Takashi Hanada·Tatsuya Ide·Koichi Maruyama
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Abstract

We proposed a new method of performance evaluation for X-ray CT using visible scintillation light and examined its usefulness in this study. When we scanned a plastic scintillator disk in a gantry opening of the X-ray CT, we could observe visible scintillation light. The rotation of the light-emitting area of the disk corresponded to that of the X-ray tube. We were able to record the scintillation light by digital video camera. By analyzing the area of visible scintillation light, the rotation speed of the X-ray tube, angular spread of the X-ray beam, uniformity of the incident X-rays, and change in X-ray energy were measured. No other method is available to obtain the above parameters of X-ray CT during a single CT scan. In the measurements of the uniformity of incident X-rays and change of X-ray energy, our method showed good accuracy in detecting the attenuation caused by the couch between the X-ray tube and the plastic scintillator disc. The proposed method is inexpensive and easy-to-use. We conclude that the method is a useful tool for performance evaluation as well as a maintenance tool for X-ray CT.

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Evaluation Studies as TopicHumansLightScattering, RadiationTomography, X-Ray ComputedEnglish AbstractJournal ArticleResearch Support, Non-U.S. Gov't

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Kiyoyuki Kodama, Minoru Hamada, Tamotsu Suzuki, Masatoshi Hashimoto, Takashi Hanada, Tatsuya Ide, Koichi Maruyama. 2004. [Performance evaluation of X-ray CT using visible scintillation light].. https://doi.org/10.6009/jjrt.kj00003326545

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