DocumentCode :
1417409
Title :
Development of ultra-fast X-ray computed tomography scanner system
Author :
Hori, Keiichi ; Fujimoto, Tetsuro ; Kawanishi, Kohei
Author_Institution :
Res. & Dev. Center, Mitsubishi Heavy Ind. Ltd., Takasago, Japan
Volume :
45
Issue :
4
fYear :
1998
fDate :
8/1/1998 12:00:00 AM
Firstpage :
2089
Lastpage :
2094
Abstract :
The development of an ultra-fast X-ray computed tomography (CT) scanner system has been achieved. This system can operate under the scanning time of 0.5 milliseconds/slice and give 2,000 slices/second. The original object of interest is in a transient or unsettled state of multiphase flow to measure the instantaneous phase distribution. An improvement of scanning speed was required to reduce the effects of motion artifact. The mechanical motion mechanism of a conventional CT scanner is a major obstacle to improve the scanning speed. Therefore, the concept of electrically switching the electron beam is adopted to reduce the scanning time. The present developed system has 60 stationary X-ray tubes and stationary 584 cadmium telluride (CdTe) semiconductor detectors. The excellent performance for the measurement and visualization of dynamic events of multiphase flow is confirmed by measuring moving acrylic resin phantoms and the air-water two phase flow in a tube or a 3×3 rod bundle. In addition, the system´s feasibility for application to the medical field is demonstrated by trial application to the movement of a dog´s heart, though the requirement remains to improve the image quality. It was confirmed by a simulation that this improvement will be achieved by increasing the number of projections
Keywords :
X-ray apparatus; biomedical equipment; cardiology; computerised tomography; multiphase flow; two-phase flow; CdTe; electrical switching electron beam; instantaneous phase distribution; medical diagnostic imaging; medical instrumentation; motion artifact effects reduction; multiphase flow; scanning time; stationary X-ray tubes; ultra-fast X-ray computed tomography scanner system; unsettled state; Cadmium compounds; Computed tomography; Electron beams; Fluid flow measurement; Phase measurement; Resins; Visualization; X-ray detection; X-ray detectors; X-ray imaging;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.708308
Filename :
708308
Link To Document :
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