Investigation of SiPM performance Stability for On-line PET Imaging with Scanning Proton Pencil Beams

Kun Hu, Xinyi Cheng, Ron Zhu, Yiping Shao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The objective of this study was to evaluate the performance of Silicon Photomultiplier (SiPM) change by radiation of neutrons induced by pencil scanning proton beam radiotherapy. Both dark current and gain changes of SiPM arrays were measured as they are the primary SiPM performance parameters. The experiment setup included a scanning proton pencil beam irradiated a human head phantom with SiPM arrays being placed nearby. Multiple repeated radiations and dark current/gain measurements were conducted. The results have shown that the impact of neutron radiations was negligible to small, with SiPM array's both dark current and gain changes less than around 1% to 2%, well within the experiment uncertainty, accumulated proton beam dose up to 12 Gy. In conclusion, for the specific pencil scanning proton beam with this study, there is unlikely any impact of neutron radiations to SiPM's performance within one fraction of the proton therapy, that is an important question for on-line PET image-based proton beam range monitoring. This conclusion is likely to be true for other pencil scanning proton beam facilities as well. On the other hand, the long term accumulated impact of neutron radiation to SPM's performance over multiple fractions of proton therapy is still an issue and should be addressed appropriately.

Original languageEnglish (US)
Title of host publication2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728141640
DOIs
StatePublished - Oct 2019
Externally publishedYes
Event2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019 - Manchester, United Kingdom
Duration: Oct 26 2019Nov 2 2019

Publication series

Name2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019

Conference

Conference2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
CountryUnited Kingdom
CityManchester
Period10/26/1911/2/19

ASJC Scopus subject areas

  • Signal Processing
  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics

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