根管
闪烁体
材料科学
光学
剂量率
光纤
闪烁
X射线
亮度
光电子学
化学
牙科
放射化学
物理
探测器
医学
作者
Zhi Yang,Tianchi Wang,Xuhui Xu,Ji‐Song Yao,Leimeng Xu,Shalong Wang,Xu Ye,Jizhong Song
标识
DOI:10.1021/acs.jpclett.2c03586
摘要
Copper-based halide perovskites have been considered as promising scintillators. However, they still cannot meet the requirement of low-dose-rate X-ray imaging in medical diagnosis. Herein, we design a fiber optic plate (FOP) coupled perovskite X-ray camera to reduce the dose rate toward dental X-ray imaging. Tl doped Cs3Cu2I5 prepared via molten salt reaction has a high light yield of 72,000 photons/MeV, resulting from Tl10/Tl20-self-trapped hole emissions. After FOP coupling, the pulp cavity, root canal, dentin and root canal file can be clearly observed under a low dose rate as low as 3 μGyair s–1, which is absolutely lower than the required 5.5 μGyair s–1 for commercial intraoral dental sensors. The realization of such a low dose rate is attributed to the high coupling efficiency of 75% for the FOP and the high brightness of 262 lm m–2 for the scintillation screen. This designed portable X-ray camera shows its huge potential in intraoral dental X-ray imaging.
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