In order to achieve the ultimate goal of reducing coincidence time resolution (CTR) to 10 ps, thus enabling reconstruction-less positron emission tomography, a Cherenkov-radiator-integrated microchannel plate photomultiplier tube (CRI) reaching CTR of sub-50 ps full width at half maximum (FWHM) has been developed. However, a histogram of time differences between a pair of the CRIs shows undesirable side peaks, which are caused by gamma rays directly interacting with the micro channel plates (MCPs). Such direct interaction events are detrimental to the timing performance of the CRI. In this paper, we demonstrate an analytical method of deconvolving MCP direct interaction events from the timing histogram. Considering the information of the main and the two side peaks, the timing uncertainty caused by the MCP direct interaction events is deconvolved and the CTR of the CRI is analytically investigated. Consequently, the CTR is improved from 41.7 to 40.5 ps FWHM by the deconvolution....

中文翻译：

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切伦科夫散热器集成MCP-PMT的定时性能的精确分析：MCP直接相互作用的解析去卷积

为了实现将重合时间分辨率（CTR）降低到10 ps的最终目标，从而实现无需重建的正电子发射断层扫描，切伦科夫辐射器集成的微通道板光电倍增管（CRI）的CTR低于全宽50 ps已开发出最大一半（FWHM）。但是，一对CRI之间的时间差直方图显示了不希望的侧峰，这是由与微通道板（MCP）直接相互作用的伽马射线引起的。这样的直接交互事件不利于CRI的定时性能。在本文中，我们演示了一种从时序直方图中解卷积MCP直接交互事件的分析方法。考虑到主峰和两个副峰的信息，对由MCP直接相互作用事件引起的时序不确定性进行反卷积，并对CRI的CTR进行了分析研究。因此，通过反卷积将CTR从41.7 ps FWHM提高到40.5 ps FWHM。