一种用于单伽马发射体的新型横断面脑成像仪。

A new transverse-section brain imager for single-gamma emitters.

作者信息

Jarritt P H, Ell P J, Myers M J, Brown N J, Deacon J M

出版信息

J Nucl Med. 1979 Apr;20(4):319-27.

Abstract

Physical and clinical data on a new emission transverse-section scanner are given. Comparative data from an earlier tomoscanner and a rotating gamma-camera system yield the following information for the three imagers. Resolution at the center of the field is 9 mm for this tomoscanner, 18 mm for the earlier tomoscanner, and 11 mm for the rotating camera; sensitivity (cps/muCi-ml) 36K, 15.4K, 1.9K; crystal area (cm2) 3096, 619, 490, respectively. The quantification of images is discussed. Clinical emission section scans of the brain, liver, chest and skull are presented and discussed. Forty brain scans were analyzed in conjunction with x-ray transmission tomography. No false positives were found. From a total of 15 lesions seen by the CT x-ray scanner, 14 were detected by the emission tomographic scanner, 12 by standard gamma-camera imaging. One false negative case (cyst) was seen by the transmission x-ray scanner but not by the emission scanner.

摘要

给出了一种新型发射型横断面扫描仪的物理和临床数据。来自早期断层扫描仪和旋转γ相机系统的比较数据为这三种成像设备提供了以下信息。该断层扫描仪在视野中心的分辨率为9毫米，早期断层扫描仪为18毫米，旋转相机为11毫米；灵敏度（计数率/微居里-毫升）分别为36K、15.4K、1.9K；晶体面积（平方厘米）分别为3096、619、490。讨论了图像的定量分析。展示并讨论了大脑、肝脏、胸部和颅骨的临床发射断层扫描。结合X射线透射断层扫描对40例脑部扫描进行了分析。未发现假阳性。在CT X射线扫描仪发现的总共15个病变中，发射型断层扫描仪检测到14个，标准γ相机成像检测到12个。透射X射线扫描仪发现1例假阴性病例（囊肿），而发射型扫描仪未检测到。