Cold Cathode Flat Panel X-ray Source for Talbot-Lau Grating Interferometer using Zinc Oxide Nanowire Field Emitter Arrays and Periodic Microstructured Anode

被引：0

作者：

Kang, Song ^{[1
]}

Qi, Guicai ^{[1
]}

Wu, Wangjiang ^{[2
]}

Wang, Chengyun ^{[1
]}

Xu, Yuan ^{[2
]}

Zhou, Linghong ^{[2
]}

Deng, Shaozhi ^{[1
]}

Xu, Ningsheng ^{[1
]}

Chen, Jun ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Elect & Informat Technol, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Peoples R China

[2] Southern Med Univ, Sch Biomed Engn, Guangzhou 510515, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2024年 / 7卷 / 22期

基金：

中国国家自然科学基金;

关键词：

flat-panel X-ray source; ZnO nanowire; fieldemitter arrays; Talbot-Lau grating interferometer; periodic microstructured array anode; ELECTRON-EMISSION; PHASE; TOMOGRAPHY;

D O I：

10.1021/acsanm.4c04410

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The X-ray phase contrast imaging using a Talbot-Lau grating interferometer (GI) can achieve high resolution of low-contrast objects such as soft tissues. The periodic microstructured X-ray source is the key to achieving this technology. We have prepared a vacuum-encapsulated cold cathode periodic microstructured flat-panel X-ray source (FPXS) using zinc oxide (ZnO) nanowire field emitter arrays and microarrays of a Mo thin film transmission target. The device has an operating voltage of 40 kV and a current of 684 mu A. A radiation dose rate of 428 mu Gy/s was measured at a distance of 10 cm from the periodic microstructured FPXS. The X-ray emission distribution is characterized by optical images and radiochromic film, and the localized X-ray emission was confirmed. The X-ray imaging capability was validated by using projection imaging. Our device has potential applications in Talbot-Lau GI phase-contrast imaging.

引用

页码：25439 / 25446

页数：8

共 32 条

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