通过单光子反卷积增强锗酸铋中的切伦科夫光子
Emphasizing Cherenkov photons from bismuth germanate by single photon deconvolution
AI总结：
针对BGO中切伦科夫光子难以从闪烁光中分辨的问题，提出利用单光子响应反卷积增强探测器波形中的微弱切伦科夫信号，实验验证其PDF与传统方法一致且符合时间分辨率改善43%。
摘要：
锗酸铋（BGO）正再次受到关注，因为它是未来飞行时间正电子发射断层成像的一种潜在闪烁体。由于其光学特性，BGO在511 keV伽马射线相互作用后会发射数量相对较多的切伦科夫光子，从而提升探测器的时间分辨率。尽管如此，在闪烁光子中高效探测切伦科夫光子，犹如大海捞针。因此，我们提出一种方法，通过对光电探测器的单光子响应进行反卷积，从探测器波形中高效增强切伦科夫光子。作为概念验证，我们执行了该反卷积，并获得了锗酸铋的概率密度函数（PDF），将其与传统的时间相关单光子计数方法进行比较。此外，我们研究了所提出的反卷积是否能够增强微弱的切伦科夫光子。结果表明，由所提出的反卷积获得的PDF与使用传统方法获得的PDF具有良好的一致性。与基于电压的前沿甄别器相比，使用所提出反卷积获得的符合时间分辨率在半高全宽方面改善了43%。可以得出结论，所提出的反卷积方法能够高效增强切伦科夫光子，并改善基于BGO的探测器的时间性能。
英文摘要：
Bismuth germanate (BGO) has been receiving attention again because it is a potential scintillator for future time-of-flight positron emission tomography. Owing to its optical properties, BGO emits a relatively large number of Cherenkov photons after 511 keV gamma-ray interactions, which pushes the timing resolution of a detector. Nonetheless, efficiently detecting Cherenkov photons among scintillation photons is similar to looking for a needle in a haystack. Thus, we propose a method that can efficiently emphasize Cherenkov photon from a detector waveform by deconvolving a single photon response of photodetector. As a proof-of-concept, we perform the deconvolution, and a probability density function (PDF) of bismuth germanate was obtained, which is compared to a conventional time correlated single photon counting method. Furthermore, we investigate if the proposed deconvolution can emphasize a faint Cherenkov photon. Consequently, the PDF obtained by the proposed deconvolution shows a good agreement with that obtained using a conventional method. A coincidence time resolution obtained using the proposed deconvolution is improved by 43% in full width at half maximum, compared to a voltage-based leading edge discriminator. It can be concluded that the proposed deconvolution method can efficiently emphasize Cherenkov photon and improve the timing performance of BGO-based detectors.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
