Perovskite computed tomography imager and three-dimensional reconstruction

被引：49

作者：

He, Yuhong ^{[1
]}

Song, Jinmei ^{[1
]}

Li, Mingbian ^{[1
]}

Sakhatskyi, Kostiantyn ^{[2
,3
]}

Li, Weijun ^{[1
]}

Feng, Xiaopeng ^{[1
]}

Yang, Bai ^{[1
,4
]}

Kovalenko, Maksym ^{[2
,3
]}

Wei, Haotong ^{[1
,4
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun, Peoples R China

[2] Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Lab Inorgan Chem, Zurich, Switzerland

[3] Empa Swiss Fed Labs Mat Sci & Technol, Dubendorf, Switzerland

[4] First Hosp Jilin Univ, Opt Funct Theragnost Joint Lab Med & Chem, Changchun, Peoples R China

来源：

NATURE PHOTONICS | 2024年 / 18卷 / 10期

基金：

中国国家自然科学基金;

关键词：

RADIATION; CT; DEFECTS; NOISE;

D O I：

10.1038/s41566-024-01506-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Indirect scintillator computed tomography (CT) imaging suffers from reduced image contrast and high-dose X-ray exposure due to inevitable light losses and multiple energy conversion steps. Here we report a direct lead-halide perovskite CT imager through low-cost spray-coating processes. Detector arrays with 980 mu m absorber thickness and <10 nm surface roughness yield uniform X-ray response with detection quantum efficiency of 80% and noise-equivalent dose of 153 pGy(air). The perovskite CT imager affords the three-dimensional reconstruction of a tooth under a low effective dose of 5.5 mu Sv, about two orders of magnitude smaller than dental cone-beam CT, and low-contrast detectability by resolving a 5 Hounsfield unit difference within a 5 mm region of interest.

引用

页码：1052 / 1058

页数：9

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