Effect of self-focusing gate structure length in CNT-based E-gun for intraoperative specimen radiographic system

Amar Prasad Gupta; Jinho Choi; Jaekyu Jang; Deokwon Seo; Mrinal Bhusal Sharma; Seung Jun Yeo; Jaeik Jung; Jeung Sun Ahn; Beom-Seok Ko; Jehwang Ryu

doi:10.1117/12.2613549

4 April 2022 Effect of self-focusing gate structure length in CNT-based E-gun for intraoperative specimen radiographic system

Amar Prasad Gupta, Jinho Choi, Jaekyu Jang, Deokwon Seo, Mrinal Bhusal Sharma, Seung Jun Yeo, Jaeik Jung, Jeung Sun Ahn, Beom-Seok Ko, Jehwang Ryu

Author Affiliations +

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 120314F (2022) https://doi.org/10.1117/12.2613549
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

A fully commercialized intraoperative specimen radiographic system (IOSRS) based on carbon nanotube (CNT) emitter has been developed and the optimization of electron beam (E-beam) focusing characteristic of X-ray source is analyzed in this paper. The IOSRS can be used inside the operation theatre and helps reduce the surgery time during breast conserving surgery by confirming the extent of margin on specimen. For this, a highly focused X-ray source is required which depends on the focusing structure of Electron gun (E-gun). Normally, a separate focuser and grid are added in the filament X-ray tube to produce a narrow E-beam and perfectly digitalized X-ray pulses, respectively. However, in CNT based X-ray tubes, the focuser and grid can be integrated as one structure called self-focusing gate structure. The self-focusing gate structure can extract electrons and focus the E-beam producing perfect pulses of X-ray dose and simultaneously enhancing the spatial resolution quality of X-ray source. In this study, we have investigated the effect of changing the length of selffocusing gate structure on the spatial resolution capability of X-ray system and its effect on the field electron emission performance of CNT E-gun.

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Amar Prasad Gupta, Jinho Choi, Jaekyu Jang, Deokwon Seo, Mrinal Bhusal Sharma, Seung Jun Yeo, Jaeik Jung, Jeung Sun Ahn, Beom-Seok Ko, and Jehwang Ryu "Effect of self-focusing gate structure length in CNT-based E-gun for intraoperative specimen radiographic system", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 120314F (4 April 2022); https://doi.org/10.1117/12.2613549

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