环形探测器正电子相机系统：其优点及临床经验。

A ring detector positron camera system: its merits: clinical experience.

作者信息

Eriksson L, Bergström M, Bohm C, Greitz T, Litton J, Sundman R, Widén L

出版信息

Neuroradiology. 1978;16:572-4. doi: 10.1007/BF00395365.

Abstract

A ring detector positron camera system for CT of the brain is described. The system uses 95 NaI (Tl) detectors, arranged with cylindrical geometry, for the simultaneous detection of coincidences from 1,900 detector combinations. With a new sampling technique an experimental system resolution of 7 mm FWHM has been obtained. The sensitivity was found to be 5,300 c/s with a 100-keV energy threshold and using a 19.2-cm-diameter cylindrical phantom with a homogeneous specific activity of 1 muCi/cm3. A clinical study of blood-brain barrier damage using 68Ga-EDTA is reported.

摘要

描述了一种用于脑部CT的环形探测器正电子相机系统。该系统使用95个NaI（Tl）探测器，以圆柱形几何结构排列，用于同时检测来自1900个探测器组合的符合事件。采用一种新的采样技术，获得了7毫米半高宽的实验系统分辨率。在100keV能量阈值下，使用直径为19.2厘米、比活度均匀为1μCi/cm³的圆柱形体模，灵敏度为5300计数/秒。报告了一项使用68Ga-EDTA对血脑屏障损伤的临床研究。