Design considerations for a positron emission transverse tomograph (PETT V) for imaging of the brain.
Design considerations for a positron emission transverse tomograph (PETT V) for imaging of the brain.
复制标题
用于大脑成像的正电子发射横向断层扫描仪 (PETT V) 的设计注意事项。
DOI：
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发表时间：
1978
影响因子：
1.3
通讯作者：
D. Ficke
中科院分区：
文献类型：
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作者：
M. Ter;N. Mullani;J. Hood;C. S. Higgins;D. Ficke
通过正电子发射断层摄影术的脑成像可以通过将断层摄影机的设计专用于该应用而针对灵敏度进行优化。我们设计了一台多层正电子发射断层扫描仪（PETT V），用于对人脑和小型实验动物全身进行成像。PETT V的探测器系统由48个NaI（Tl）闪烁探测器组成的圆形阵列组成，每个探测器配有两个光电倍增管，具有一维定位能力。通过旋转检测器的圆形阵列和通过检测器圆的摆动运动来实现适当的采样。所提出的系统能够同时提供7个切片，在切片平面内的空间分辨率为7至15 mm，切片厚度为7和14 mm。最小扫描时间为1秒。对于分辨率约为1.5 x 1.5 cm的20 cm直径体模，PETT V的估计总体灵敏度为350，000计数/秒/mCi。系统正在建设中。
Imaging of the brain by positron emission tomography can be optimized for sensitivity by dedicating the design of the tomograph to this application. We have designed a multislice positron emission tomograph (PETT V) for imaging the human brain and the whole body of small experimental animals. The detector system of PETT V consists of a circular array of 48 NaI(Tl) scintillation detectors, each fitted with two photomultiplier tubes, with one dimensional positioning capability. Suitable sampling is achieved by rotation of the circular array of detectors and by a wobbling motion of the detector circle. The proposed system is capable of providing seven slices simultaneously, with a spatial resolution in the plane of the slice from 7 to 15 mm and with slice thicknesses of 7 and 14 mm. The minimum scanning time is 1 sec. The estimated overall sensitivity of PETT V is 350,000 counts/sec/mCi in a 20 cm diameter phantom for a resolution of approximately 1.5 x 1.5 cm. The system is under construction.