Development of high-speed micro computed tomography system based on carbon nanotube emitter x-ray source

Wooseob Kim; Jaeik Jung; Shalini Rajpoot; Weon-Kuu Chung; Jeungsun Ahn; Byeong-No Lee; Jehwang Ryu

doi:10.1117/12.2613305

4 April 2022 Development of high-speed micro computed tomography system based on carbon nanotube emitter x-ray source

Wooseob Kim, Jaeik Jung, Shalini Rajpoot, Weon-Kuu Chung, Jeungsun Ahn, Byeong-No Lee, Jehwang Ryu

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 1203121 (2022) https://doi.org/10.1117/12.2613305
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

A carbon nanotube (CNT) emitter-based high-speed micro-computed tomography (CT) system is designed herein. CT scans result in prolonged exposure to radiation, thus, pulsed-field emission is performed to generate pulsed X-rays to reduce radiation dose. The radiation dose rates of continuous X-rays and X-rays generated by different pulses were compared. X-rays were stably generated 40 times per second through a pulsed-field emission current with MOSFET circuit. The CNT field emitter characteristic was maintained for more than 35 hours continuously, which means more than 5 million X-ray shots can be taken when sufficient current flows on pulse mode. X-ray images were also successfully acquired through such pulse driving.

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Wooseob Kim, Jaeik Jung, Shalini Rajpoot, Weon-Kuu Chung, Jeungsun Ahn, Byeong-No Lee, and Jehwang Ryu "Development of high-speed micro computed tomography system based on carbon nanotube emitter x-ray source", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 1203121 (4 April 2022); https://doi.org/10.1117/12.2613305

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