Development of an ultra-low-dose fluoroscopy system with real-time frame rate modulation using a fully digital x-ray tube

Sora Park; Jin-Woo Jeong; Jae-Woo Kim; Jun-Tae Kang; Ki Nam Yun; Seong Jun Kim; Sunghoon Choi; Eunsol Go; Jeong-Woong Lee; Yujung Ahn; Ji-Hwan Yeon; Sunghee Kim; Yoon-Ho Song

doi:10.1117/12.2613215

4 April 2022 Development of an ultra-low-dose fluoroscopy system with real-time frame rate modulation using a fully digital x-ray tube

Sora Park, Jin-Woo Jeong, Jae-Woo Kim, Jun-Tae Kang, Ki Nam Yun, Seong Jun Kim, Sunghoon Choi, Eunsol Go, Jeong-Woong Lee, Yujung Ahn, Ji-Hwan Yeon, Sunghee Kim, Yoon-Ho Song

Author Affiliations +

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 120313W (2022) https://doi.org/10.1117/12.2613215
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

Fluoroscopy is radiological technique that can continuously radiate x-ray to penetrate the body and observe the results in real-time video or still images through a monitor. It is useful in providing a real-time x-ray view in interventional and angiographic procedures, but it has several issues such as the risk of huge radiation exposure for patients and operators, and poor image quality due to motion blur. Most fluoroscopy systems based on a thermionic analog x-ray tube adapt fixed pulse driving method using a high-voltage modulation over 100 kV, which imposes limits in reducing unnecessary exposure due to the low time resolution of several ms or more and inflexible pulse condition. In this study, we developed an advanced fluoroscopy system with real-time frame rate modulation using a fully vacuum-sealed digital x-ray tube based on carbon nanotube (CNT) field emitters, providing ultra-low-dose and high-temporal resolution x-ray viewing. The CNT digital x-ray tube with an operational voltage of 120 kV and current of 20 mA, and the fully digital modulation monoblock with pulses of down to 0.1 ms at 1 kHz were fabricated for the advanced fluoroscopy system. Using the developed fluoroscopy system, we could modulate the frame rate in the rage of 1-30 Hz in real-time even during the operation along with perfect digital x-ray pulses, and finally reduce x-ray dose by 56% with improved fluoroscopy image clarity compared to the conventional system under the operation condition, confirming significant reducing of motion blur and unnecessary exposure.

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Sora Park, Jin-Woo Jeong, Jae-Woo Kim, Jun-Tae Kang, Ki Nam Yun, Seong Jun Kim, Sunghoon Choi, Eunsol Go, Jeong-Woong Lee, Yujung Ahn, Ji-Hwan Yeon, Sunghee Kim, and Yoon-Ho Song "Development of an ultra-low-dose fluoroscopy system with real-time frame rate modulation using a fully digital x-ray tube", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 120313W (4 April 2022); https://doi.org/10.1117/12.2613215

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