Optimizing the performance of a PET detector using discrete GSO crystals on a continuous lightguide
Optimizing the performance of a PET detector using discrete GSO crystals on a continuous lightguide
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在连续光导上使用离散 GSO 晶体优化 PET 探测器的性能
DOI：
10.1109/nssmic.1999.845818
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
F. Liu
中科院分区：
文献类型：
--
作者：
S. Surti;Joel S. Karp;R. Freifelder;F. Liu
作者正在设计一种新型PET探测器，在带有39 mm PMT的连续光导上使用离散的4/spl times/4/spl times/10 mm/sup 3/ GSO晶体。探测器的光响应函数（LRF）是PMT接收到的光量与光源位置的函数关系。它必须通过精心设计的光导来控制，以便识别4 mm晶体。理想的LRF应该是窄的，在PMT直径上具有线性变化。模拟结果表明，1.81厘米厚的光导产生一个狭窄的LRF与良好的晶体歧视。然而，这个LRF的尾巴很长。通过使用在其前表面中切割有5 mm槽的2.31cm光导可以实现进一步的改进。这导致一个尖锐的边缘，几乎三角形，LRF。开槽光导还使对伽马射线的相互作用的变化深度的空间依赖性最小化。不同的槽深度的效果也通过模拟进行了研究。这是在保持光导连续区域的厚度恒定的同时完成的。进行了实验，并与模拟结果基本一致。这种探测器的良好空间分辨率和窄LRF将导致具有良好计数率能力的高分辨率PET扫描器。
The authors are designing a new detector for PET using discrete 4/spl times/4/spl times/10 mm/sup 3/ GSO crystals on a continuous lightguide with 39 mm PMTs. The Light Response Function (LRF) of a detector is the amount of light received by a PMT as a function of the source position. It has to be controlled by a careful design of the lightguide in order to identify 4 mm crystals. The ideal LRF should be narrow with a linear variation over the PMT diameter. Simulations show that a 1.81 cm thick lightguide produces a narrow LRF with good crystal discrimination. However, the tails of this LRF are long. A further improvement can be achieved by using a 2.31 cm lightguide with 5 mm slots cut in its front surface. This results in a sharp edged, almost triangular, LRF. The slotted lightguide also minimizes the spatial dependence on varying depths of interaction of the gamma ray. The effect of varying slot depths was also investigated through the simulations. This was done while keeping the thickness of the lightguide continuous area constant. Experiments were performed and shown to be in general agreement with the simulations. The good spatial resolution and narrow LRF of such a detector will result in a high resolution PET scanner with good count rate capability.
HEAD PENN-PET 扫描仪的三维成像特性。
DOI：
--
发表时间：
1997
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
--
作者：
Karp,JS;Freifelder,R;Geagan,MJ;Muehllehner,G;Kinahan,PE;Lewitt,RM;Shao,L
通讯作者：
Shao,L