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Scattered radiation doses absorbed by technicians at different distances from X-ray exposure: Experiments on prosthesis

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 4th International Conference on Biomedical Engineering and Biotechnology, 18–21 August 2015, Shanghai, China

Guest editors: Feng Liu, Dong-Hoon Lee, Ricardo Lagoa and Sandeep Kumar

Article type: Research Article

Authors: Chiang, Hsien-Wena; * | Liu, Ya-Lingb; c | Chen, Tou-Rongd | Chen, Chun-Lona | Chiang, Hsien-Jena | Chao, Shin-Yua

Affiliations: [a] Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan | [b] Department of Medical Imaging and Radiological Sciences, College of Health Science, Kaohsiung Medical University, Taiwan | [c] Shing-Hou Hospital, Kaohsiung, Taiwan | [d] School of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, Taiwan

Correspondence: [*] Address for correspondence: Hsien-Wen Chiang, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. Tel.: +8867317123-2139; Fax: +8867317123-2523; E-mail: [email protected].

Keywords: Portable X-ray machine, dose, exposure, ionization chamber dosimeter

DOI: 10.3233/BME-151463

Journal: Bio-Medical Materials and Engineering, vol. 26, no. s1, pp. S1641-S1650, 2015

Published: 2015
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This work aimed to investigate the spatial distribution of scattered radiation doses induced by exposure to the portable X-ray, the C-arm machine, and to simulate the radiologist without a shield of lead clothing, radiation doses absorbed by medical staff at 2 m from the central exposure point. Material and method: With the adoption of the Rando Phantom, several frequently X-rayed body parts were exposed to X-ray radiation, and the scattered radiation doses were measured by ionization chamber dosimeters at various angles from the patient. Assuming that the central point of the X-ray was located at the belly button, five detection points were distributed in the operation room at 1 m above the ground and 1-2 m from the central point horizontally. Results: The radiation dose measured at point B was the lowest, and the scattered radiation dose absorbed by the prosthesis from the X-ray’s vertical projection was 0.07 ±0.03 μGy, which was less than the background radiation levels. The Fluke biomedical model 660-5DE (400 cc) and 660-3DE (4 cc) ion chambers were used to detect air dose at a distance of approximately two meters from the central point. The AP projection radiation doses at point B was the lowest (0.07±0.03 μGy) and the radiation doses at point D was the highest (0.26±0.08 μGy) .Only taking the vertical projection into account, the radiation doses at point B was the lowest (0.52 μGy), and the radiation doses at point E was the highest (4 μGy).The PA projection radiation at point B was the lowest (0.36 μGy) and the radiation doses at point E was the highest(2.77 μGy), occupying 10-32% of the maximum doses. The maximum dose in five directions was nine times to the minimum dose. When the PX and the C-arm machine were used, the radiation doses at a distance of 2 m were attenuated to the background radiation level. The radiologist without a lead shield should stand at point B of patient’s feet. Accordingly, teaching materials on radiation safety for radiological interns and clinical technicians were formulated.

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