학술논문
Clinical SiPM-Based MRI-Compatible SPECT: Preliminary Characterization
Document Type
Periodical
Author
Source
IEEE Transactions on Radiation and Plasma Medical Sciences IEEE Trans. Radiat. Plasma Med. Sci. Radiation and Plasma Medical Sciences, IEEE Transactions on. 4(3):371-377 May, 2020
Subject
Language
ISSN
2469-7311
2469-7303
2469-7303
Abstract
The initial characterization of the first single-photon emission computed tomography (SPECT) insert for simultaneous human brain imaging inside magnetic resonance imaging (MRI) is presented. The instrument features a novel multimini-slit-slat collimator and a static ring of 20 detectors. The scanner architecture is modular and represents the scale-up of a preclinical version whose MRI-compatibility has been already successfully demonstrated. The detectors are based on CsI(Tl) crystals (50 mm $\times $ 100 mm $\times $ 8 mm) coupled to arrays of silicon photomultipliers and ASIC readout for a total of 1440 channels. The transaxial field of view (FoV) is 20 cm by 9 cm in the axial direction. The experimental results show a sensitivity of 362 cps/MBq, an energy resolution of ~17% (at 140 keV), and a tomographic extrinsic resolution in the transaxial plane of ~8 mm across the whole FoV.