中文摘要：

分析了晶体探测器的原理、结构和性能及其发展趋势，阐述了它在正电子断层扫描中的重要地位．在分析和比较不同类型的快闪烁晶体在PET探测器领域的发展基础上着重论述了更先进的晶体LYSO．采用通过光导将LYSO晶体耦合在位置灵敏型光电倍增管上的探头组成方式，这是一种新的闪烁晶体探测器技术，提高了探头的探测效率。

英文摘要：

Crystal probe principle, structure and function and their developing trend has been analyzed. There have set forth its important position in positive electron fault scanning. Quick seintillation being unlike a type in analysis and eomparison crystal emphasizes LYSO having discussed and more advanced crystal in development of PET probe field on the basis. The detector that the project has adopt to pass a light guide with LYSO crystal coupling on keen location type photoelectricity multiplication is composed of way. This is one kind of new scintillation crystal probe technology. The detector probing efficiency is greatly improved.