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Proceedings Paper

Development and evaluation of a real-time three-dimensional CT (4D-CT) scanner
Author(s): Yasuo Saito; Hiroshi Aradate; Hiroaki Miyazaki; Yoji Kudo; Kazuhiko Tsujita; Nobuhisa Shimadu; Yuji Sawanaga
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Paper Abstract

4D-CT scanner is a high-speed cone-beam CT with good low- contrast detectability. In a single rotation, a voxel data set with higher spatial resolution over a wide z-axis can be obtained. Using continuous rotation, temporarily continuous voxel data sets and 3D dynamic images can be acquired. We have developed a 4D-CT prototype system using a large area 2D detector with high speed rotating gantry. The key technologies for 4D-CT scanner are a large area 2D detector, high-speed and continuous rotating gantry with high-speed data transfer. The full size 2D detector for prototype system has 912 channels, 256 detector rows for 0.5 mm slice thickness, and the sampling speed is 900 view/s. The rotation speed of the gantry is 1.0 s/rotation, and the speed of the data transfer system must be more than 5Gbps. The data transfer system consists of laser diode and photo diode. We have got real-time volume images of crayfish, moving jaw and breathing lung. We will start clinical research at next stage, and continue to improve the image quality.

Paper Details

Date Published: 3 May 2002
PDF: 8 pages
Proc. SPIE 4682, Medical Imaging 2002: Physics of Medical Imaging, (3 May 2002); doi: 10.1117/12.465631
Show Author Affiliations
Yasuo Saito, Toshiba Medical Systems Co. (Japan)
Hiroshi Aradate, Toshiba Medical Systems Co. (Japan)
Hiroaki Miyazaki, Toshiba Medical Systems Co. (Japan)
Yoji Kudo, Toshiba Medical Systems Co. (Japan)
Kazuhiko Tsujita, Toshiba Medical Systems Co. (Japan)
Nobuhisa Shimadu, Toshiba Medical Systems Co. (Japan)
Yuji Sawanaga, Toshiba Medical Systems Co. (Japan)


Published in SPIE Proceedings Vol. 4682:
Medical Imaging 2002: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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