4. 超高速 CT : 開発の歴史と将来展望(高速 X 線 CT の現状と臨床評価)

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Imaging time of the X-ray computed tomography has been shortened dramatically since the first generation of EMI MARK-I was invented. However, recent CT scanner still has the imaging time of order of 1 second, which is not suitable for obtaining stop-motion cross-section of the heart. In order to construct a CT with ultrafast speed, two attempts were made : One is the multi-souce and multi-detector system which is represented by Dynamic Spatial Reconstructor of Mayo Clinic and the second employs the scanning electron beam system. The latter system has been developed in Japan by Tateno and Iinuma et. al. as the X-ray microbeam scanning system called "Dynamic Scanner" and then the proposal for ultrafast computed tomography has been made in 1977 by them. Boyd of UCSF has published a paper on cardiovascular computed tomography (CVCT) using the same principle of scanning electron beam in 1979 and produced a commercial machine of Imatron C-100 ultrafast CT. There are several problems with the present C-100 scanner which is costly and large in space, but these will be solved in the future. Spatial resolution is expected to increase by a factor of two, soon. In my view, the ultrafast CT will start a new era of CT diagnosis of real-time 3-dimensional X-ray anatomy that is not possible with the present CT scanner, and will contribute siginificantly to the non-invasive detection of heart diseases, cancer and brain disorders.
公益社団法人日本放射線技術学会の論文
1992-01-01

4. 超高速 CT : 開発の歴史と将来展望(高速 X 線 CT の現状と臨床評価)

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