Performance of mobile digital X-ray fluoroscopy using a novel flat panel detector for intraoperative use

Subtitle:

Article type: Research Article

Authors: Jeong, Chang-Won^a | Ryu, Jong-Hyun^a | Joo, Su-Chong^b | Jun, Hong-Young^a | Heo, Dong-Woon^a | Lee, Jinseok^c | Kim, Kyong-Woo^d | Yoon, Kwon-Ha^{a; e; *}

Affiliations: [a] Imaging Science Research Center, Wonkwang University School of Medicine, Iksan, Jeonbuk, Korea | [b] Department of Computer Engineering, Wonkwang University School of Medicine, Iksan, Jeonbuk, Korea | [c] Department of Biomedical Engineering, Wonkwang University School of Medicine, Iksan, Jeonbuk, Korea | [d] Nanofocusray, Technoville JBTP, Jeonju, Jeonbuk, Korea | [e] Department of Radiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, Korea

Correspondence: [*] Corresponding author: Kwon-Ha Yoon, Department of Radiology, Wonkwang University School of Medicine and Hospital, 344-2 Sinyong-dong, Iksan, Jeonbuk 570-749, Korea. Tel.: +82 63 859 1921; Fax: +82 63 851 4749; E-mail: khy1646@wonkwang.ac.kr

Abstract: BACKGROUND: Technologies employing digital X-ray devices are developed for mobile settings. OBJECTIVE: To develop a mobile digital X-ray fluoroscopy (MDF) for intraoperative guidance, using a novel flat panel detector to focus on diagnostics in outpatient clinics, operating and emergency rooms. METHODS: An MDF for small-scale field diagnostics was configured using an X-ray source and a novel flat panel detector. The imager enabled frame rates reaching 30 fps in full resolution fluoroscopy with maximal running time of 5 minutes. Signal-to-noise (SNR), contrast-to-noise (CNR), and spatial resolution were analyzed. Stray radiation, exposure radiation dose, and effective absorption dose were measured for patients. RESULTS: The system was suitable for small-scale field diagnostics. SNR and CNR were 62.4 and 72.0. Performance at 10% of MTF was 9.6 lp/mm (53 μ m) in the no binned mode. Stray radiation at 100 cm and 150 cm from the source was below 0.2 μ Gy and 0.1 μ Gy. Exposure radiation in radiography and fluoroscopy (5 min) was 10.2 μ Gy and 82.6 mGy. The effective doses during 5-min-long fluoroscopy were 0.26 mSv (wrist), 0.28 mSv (elbow), 0.29 mSv (ankle), and 0.31 mSv (knee). CONCLUSIONS: The proposed MDF is suitable for imaging in operating rooms.

Keywords: Mobile digital X-ray fluoroscopy, flat panel detector, radiation dose, intraoperative use

DOI: 10.3233/XST-150495

Journal: Journal of X-Ray Science and Technology, vol. 23, no. 3, pp. 365-372, 2015