A1 Refereed original research article in a scientific journal
Performance Evaluation of New PET/CT DigitMI 930
Authors: Zhang, Bo; Li, Bingxuan; Fang, Lei; Zhou, Xiaoyun; Li, Ang; Zhang, Xuan; Liu, Yang; Wang, Zhuo; Kao, Chien-Min; Liu, Yuqing; Zhu, Xiaohua; Wan, Lin; Xiao, Peng; Chen, Xun; Iida, Hidehiro; Knuuti, Juhani; Xie, Qingguo
Publisher: IEEE
Publishing place: PISCATAWAY
Publication year: 2025
Journal: IEEE Transactions on Radiation and Plasma Medical Sciences
Journal name in source: IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES
Journal acronym: IEEE T RADIAT PLASMA
Volume: 9
Issue: 5
First page : 578
Last page: 585
Number of pages: 8
ISSN: 2469-7311
eISSN: 2469-7303
DOI: https://doi.org/10.1109/TRPMS.2025.3526659
Web address : https://doi.org/10.1109/TRPMS.2025.3526659
The study evaluates the performance of the DigitMI 930 positron emission tomography (PET)/CT system, featuring detector modules with an 1:1:1 coupling of the scintillation crystal, the photosensor, and the electronic readout channel, in adherence to the NEMA NU 2-2018 standard. Moreover, brain and whole-body images were used to assess image quality. The radial, tangential, and axial resolutions at a radial offset of 1 cm were 3.9, 3.9, and 3.7 mm, respectively. The average sensitivity was measured at 16.2 cps/kBq. The peak noise-equivalent count rate was calculated as 412.5 kcps at 34.5 kBq/mL. At an activity concentration of 5.3 kBq/mL, the scatter fraction was 37.5%, and the time-of-flight (TOF) resolution was 248.6 ps. The contrast recovery coefficient ranged from 70.6% to 87.7% with TOF reconstruction. Despite increased noise in shorter whole-body scans, critical lesions remained identifiable at 20-s durations per bed position. The DigitMI 930 PET/CT system demonstrates a strong overall performance, particularly noteworthy for its low spatial resolution to crystal size ratio in comparison to other clinical PET systems. Moreover, the clinical studies indicate that the DigitMI 930 PET/CT system is capable of generating high-quality clinical images with high sensitivity for detecting small lesions, even at low injection doses or short scanning times.
Funding information in the publication:
National Natural Science Foundation of China (NSFC) (Grant Number: 62201193 and 62250002)
10.13039/501100001809-National Research and Development Program for Major Research Instruments of Natural Science Foundation of China (Grant Number: 61927801)
