Korean Journal of Digital Imaging in Medicine (대한디지털의료영상학회논문지)
- Volume 14 Issue 2
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- Pages.1-8
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- 2012
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- 1976-7641(pISSN)
Dose and Image Assessment according to Radiologic Factors Variation at Digital Humerus X-ray Examination
디지털 환경에서 Humerus 검사 시 촬영인자 변화에 따른 선량 및 화질 평가
- Kim, Seong Min (Department of Radiology, Asan Medical Center) ;
- Hong, Seon Sook (Department of Radiology, Asan Medical Center) ;
- Lee, Kwan Sup (Department of Radiology, Asan Medical Center) ;
- Ha, Dong Yun (Department of Radiology, Asan Medical Center)
- Received : 2012.09.14
- Accepted : 2012.10.26
- Published : 2012.10.31
Abstract
Purpose : We aim at presenting the optimum radiologic factor through the evaluation of dose variation and of image quality through the use of a grid in Humerus examination and the change of dose because of the change of radiologic factor. Materials and Methods : We divided it in 3 cases: when using a grid or not and when using IP(Image Plate) in a digital system. Also, as fixing kVp to 70kVp it changed mAs, and fixing mAs to 10 it changed kVp, we put up resolution chart and Burger rose phantom on the acrylic phantom of 7cm (the same level of Humerus) to evaluate the dose and image. We used Image J program to evaluate the quantitative resolution of the obtained image, and made the qualitative evaluation and statistical analysis of the image saved in PACS for 20 radiologic technologist with more than 10 years of experience in order of evaluate its contrast. We used SPSS10(SPSS Inc. Chicago, Illinois) for statistical analysis. Results : We observed the analytic result of resolution by the change of kVp that it was