Clarke L P, Malone J F, Casey M
Br J Radiol. 1982 Feb;55(650):125-33. doi: 10.1259/0007-1285-55-650-125.
The response of a gamma camera and a rectilinear scanner to small sources containing 131I was assessed from the point of view of thier suitability for measuring the activity of a source, as opposed to their capacity to produce well-resolved images. The influence of the size of the area over which counts were integrated, and of the size and depth of hte source, were investigated for both instruments. The results indicate that both instruments are dependent on these variables, though with the particular instruments investigated the dependence of the gamma camera is much more complex and difficult to define. The conclusions indicate that with these systems quantitative activity measurements are more readily achievable with the scanner than with the camera.
从测量源活度的适用性角度，而非生成高分辨率图像的能力角度，评估了γ相机和直线扫描器对含¹³¹I的小源的响应。针对这两种仪器，研究了计数积分区域大小以及源的大小和深度的影响。结果表明，这两种仪器均依赖于这些变量，不过在所研究的特定仪器中，γ相机的依赖性要复杂得多且难以界定。结论表明，对于这些系统，使用扫描器比使用相机更易于进行定量活度测量。
