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Subtitle:
Article type: Research Article
Authors: Kim, Sung-Chula | Lee, Hae-Kagb | Lee, Yang-Subc; d | Cho, Jae-Hwand; *
Affiliations: [a] Department of Radiological Science, Gachon University Medical Campus, Incheon, Korea | [b] Department of Computer Science and Engineering, Soonchunhyang University, Asan, Korea | [c] Department of Radiology, Asan Medical Center, Seoul, Korea | [d] Department of International Radiological Science, Hallym University of Graduate Studies, Seoul, Korea
Correspondence: [*] Corresponding author: Jae-Hwan Cho, Department of International Radiological Science, Hallym University of Graduate Studies, 427, Yeoksam-ro, Gangnam-gu, Seoul 135-841, Korea. Tel.: +82 70 8680 5900; Fax: +82 2 3453 6618; E-mail: 8452404@hanmail.net
Abstract: We found a way to optimize the image quality and reduce the exposure dose of patients through the proper activity combination of the automatic exposure control system chamber for the dose optimization when examining the pelvic anteroposterior side using the phantom of the human body standard model. We set 7 combinations of the chamber of automatic exposure control system. The effective dose was yielded by measuring five times for each according to the activity combination of the chamber for the dose measurement. Five radiologists with more than five years of experience evaluated the image through picture archiving and communication system using double blind test while classifying the 6 anatomical sites into 3-point level (improper, proper, perfect). When only one central chamber was activated, the effective dose was found to be the highest level, 0.287 mSv; and lowest when only the top left chamber was used, 0.165 mSv. After the subjective evaluation by five panel members on the pelvic image was completed, there was no statistically meaningful difference between the 7 chamber combinations, and all had good image quality. When testing the pelvic anteroposterior side with digital radiography, we were able to reduce the exposure dose of patients using the combination of the top right side of or the top two of the chamber.
Keywords: Digital radiography, auto exposure control, chamber, dose optimization
DOI: 10.3233/XST-150492
Journal: Journal of X-Ray Science and Technology, vol. 23, no. 3, pp. 321-330, 2015
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