Feasibility study of SiPM based scintillation detector for dual-energy X-ray absorptiometry

Autor: Chanwoo Park, Hankyeol Song, Jinhun Joung, Yongkwon Kim, Kyu Bom Kim, Yong Hyun Chung
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Nuclear Engineering and Technology, Vol 52, Iss 10, Pp 2346-2352 (2020)
Druh dokumentu: article
ISSN: 1738-5733
DOI: 10.1016/j.net.2020.03.030
Popis: Dual-energy x-ray absorptiometry (DXA) is the noninvasive method to diagnose osteoporosis disease characterized by low bone mass and deterioration of bone tissue. Many global companies and research groups have developed the various DXA detectors using a direct photon-counting detector such as a cadmium zinc telluride (CZT) sensor. However, this approach using CZT sensor has some drawback such as the limitation of scalability by high cost and the loss of efficiency due to the requirement of a thin detector.In this study, a SiPM based DXA system was developed and its performance evaluated experimentally. The DXA detector was composed of a SiPM sensor coupled with a single LYSO scintillation crystal (3 × 3 × 2 mm3). The prototype DXA detector was mounted on the dedicated front-end circuit consisting of a voltage-sensitive preamplifier, pulse shaping amplifier and constant fraction discriminator (CFD) circuit. The SiPM based DXA detector showed the 34% (at 59 keV) energy resolution with good BMD accuracy. The proposed SiPM based DXA detector showed the performance comparable to the conventional DXA detector based on CZT.
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