X-ray tube based on carbon nanotube field emitter for low dose mini C-arm fluoroscopy

Jongmin Lim; Amar P. Gupta; Hangyeol Park; Jinho Choi; Jaeik Jung; Jaekyu Jang; Seung Jun Yeo; Jeung Sun Ahn; Byeong-No Lee; Moon Shik Chae; Jehwang Ryu

doi:10.1117/12.2582090

15 February 2021 X-ray tube based on carbon nanotube field emitter for low dose mini C-arm fluoroscopy

Jongmin Lim, Amar P. Gupta, Hangyeol Park, Jinho Choi, Jaeik Jung, Jaekyu Jang, Seung Jun Yeo, Jeung Sun Ahn, Byeong-No Lee, Moon Shik Chae, Jehwang Ryu

Author Affiliations +

Proceedings Volume 11595, Medical Imaging 2021: Physics of Medical Imaging; 1159539 (2021) https://doi.org/10.1117/12.2582090
Event: SPIE Medical Imaging, 2021, Online Only

Conference Poster

Abstract

We designed and developed the vacuum sealed x-ray tube based on carbon nanotube(CNT) field emitter for mobile medical x-ray devices and also design the test bed for CNT x-ray tube. The CNT was synthesized by chemical vapor deposition(CVD) method on a metal alloy substrate. The grown CNT is assembled with a gate and a focuser and then combined into an electron gun(e-gun) through a brazing process. The the e-gun had an aging process inside the vacuum chamber. As a result of aging, the CNT e-gun was able to generate anode current of 1.5 mA at electric field of about 4 V/μm, and field emission current was also stabilized. After the aging process, the e-gun was brazed into a ceramic X-ray tube inside a high-temperature furnace at a vacuum degree of E^-06 torr and vacuum sealed. Field emission characteristic was measured using this X-ray tube and compared with an e-gun, and almost similar results were obtained. Incase of Xray tube, we applied a higher electric field while controlling the current at 500ms intervals through pulse driving. As a result, X-ray images of human teeth were successfully acquired using CNT X-ray tubes.

Conference Presentation

Citation Download Citation

Jongmin Lim, Amar P. Gupta, Hangyeol Park, Jinho Choi, Jaeik Jung, Jaekyu Jang, Seung Jun Yeo, Jeung Sun Ahn, Byeong-No Lee, Moon Shik Chae, and Jehwang Ryu "X-ray tube based on carbon nanotube field emitter for low dose mini C-arm fluoroscopy", Proc. SPIE 11595, Medical Imaging 2021: Physics of Medical Imaging, 1159539 (15 February 2021); https://doi.org/10.1117/12.2582090

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