Research of Photon Counting Dual-energy X-ray Absorptiometry Based on SiPM

Zhongyi Wu, Qiang Du, Jingqing Mo, Benjamin M.W. Tsui, Mingshan Sun, Daoming Xi, Gang Yuan, Jian Zheng, Xiaodong Yang

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

Abstract

Recently there has been an increase of clinical cases of osteoporosis due to an increase in the ageing population. As an established diagnostic tool for osteoporosis, dual-energy x-ray absorptiometry (DEXA) is widely used due to its high accuracy, precision and image quality. In recent years, a new type of silicon-based photomultipliers, SiPMs, has been developed which has high potential to be used in photon counting DEXA detectors for its compact size and reliable performance. In this work, we designed a DEXA test platform with a SiPM and evaluated its performance using various bone density imaging parameters. The experimental DEXA platform is constructed with a fan-beam geometry consisting of an x-ray source from Spellman and a self-developed scanning motion control system. We studied the performance characteristics of a 64-channel YSO/SiPM array detector and compared them with a cadmium zinc telluride (CZT) detector. The maximum-likelihood (ML) estimation method was used to optimize the surface fitting algorithm to achieve high material decomposition accuracy. The results show the average error of the YSO/SiPM detector is 1.24% for PMMA and 1.72% for Al. We conclude the YSO/SiPM detector can achieve material decomposition accuracy close to CZT detector and it has the potential in DEXA imaging with good imaging performance characteristics at low cost.

Original languageEnglish (US)
Title of host publication2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538684948
DOIs
StatePublished - Nov 2018
Event2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Sydney, Australia
Duration: Nov 10 2018Nov 17 2018

Publication series

Name2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings

Conference

Conference2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018
CountryAustralia
CitySydney
Period11/10/1811/17/18

Keywords

  • Bone Mineral Density
  • DEXA
  • Photon Counting
  • SiPM

ASJC Scopus subject areas

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

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  • Cite this

    Wu, Z., Du, Q., Mo, J., Tsui, B. M. W., Sun, M., Xi, D., Yuan, G., Zheng, J., & Yang, X. (2018). Research of Photon Counting Dual-energy X-ray Absorptiometry Based on SiPM. In 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings [8824539] (2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2018.8824539