Akiyama Y, Yui N, Sakata S, Kinoshita F, Koakutsu M
Radioisotopes. 1983 Jul;32(7):323-9.
Several methods to obtain the body contour which is necessary to reconstruct the quantitative images with single photon radionuclide computed tomography (SPRCT) are described in this paper. A multipurpose gamma camera system which is composed of 2 detectors, data processor and others were used to collect the data of SPRCT and body contour. An iterative reconstruction technique was implemented to reconstruct the image. Three methods for obtaining the body contour were tested. The first method utilizes X-ray CT data. The data which are obtained by GE CT/T are transferred to the data processor of SPRCT through the off-line magnetic tape and delineate the body contour. The second method uses a transmission source which was attached on the opposite side to detector. The third method uses gamma-rays which are generated by Compton scatter in the tissue of patient. The first and the second methods were able to use to obtain the body contour, but the contour obtained by third method was not accurate.
本文介绍了几种获取身体轮廓的方法，这些方法对于用单光子放射性核素计算机断层扫描（SPRCT）重建定量图像是必不可少的。一个由2个探测器、数据处理器等组成的多功能伽马相机系统被用于收集SPRCT和身体轮廓的数据。采用迭代重建技术来重建图像。测试了三种获取身体轮廓的方法。第一种方法利用X射线CT数据。由GE CT/T获得的数据通过离线磁带传输到SPRCT的数据处理器，并勾勒出身体轮廓。第二种方法使用附着在探测器对面的透射源。第三种方法使用患者组织中康普顿散射产生的伽马射线。第一种和第二种方法能够用于获取身体轮廓，但第三种方法获得的轮廓不准确。
