NUCLEAR MEDICAL IMAGING

继续致力于全面运作的双平面成像系统 在此期间，电子和机械元件的 系统成像床/支撑臂的机械设计 相机完成，并在几个月的时间里，制造， 最终形式。这个单位现在在核医学系， 可供使用。系统电子部件的工作是 加快两个数据采集板的安装和软件 完成允许使用MAC II采集图像数据 微机进行了几次硬件和软件的迭代 从而产生能够获取所有形式的核图像的系统 数据两种光电倍增管的性能 的）闪烁相机进行了深入的研究， 性能数据现在存在的特点，大多数的基本 这些管/相机的特性，例如，空间分辨率，空间的 线性等，以及指出重要的局限性，例如。空间 相关管增益。用于改善空间线性度的校正电路 和增益均匀性已经设计，现在正在制造， 试验.

Work towards a fully operational, dual planar imaging system continued during this period on both the electronic and mechanical elements of the system. The mechanical design of the imaging bed/support arms for the camera was finalized and during a period of several months, fabricated,in final form. This unit is now in the Department of Nuclear Medicine and is available for use. Work on the electronic components of the system was accelerated. Installation and software of two data acquisition boards was completed permitting image data to be acquired with the MAC II microcomputer. Several iterations of hardware and software were undertaken resulting in a system capable of acquiring all forms of nuclear image data. Performance of the two (positron-sensitive photomultiplier tube based) scintillation cameras was intensively investigated and a body of performance data now exists that characterizes most of the essential properties of these tubes/cameras, eg. spatial resolution, spatial linearity, etc., as well as indicating important limitations, eg. spatial dependent tube gain. Correction circuits for improving spatial linearity and gain uniformity have been designed and are now being fabricated for testing.