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http://dx.doi.org/10.5573/ieek.2013.50.2.203

Research for The Environmental Optimization of Dose and Image quality in Digital Radiography  

Lee, Kwang Jae (Department of Radiology, Eulji General Hospital)
Kim, MinGi (Department of Electronic & Information Engineering, Korea University)
Lee, Jong Woong (Department of Radiology, Kyung Hee Hospital at Gangdong)
Kim, Ho Cheol (Department of Radiologic Technology, Eulji University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.2, 2013 , pp. 203-209 More about this Journal
Abstract
Digital Radiography (DR) has improved a quality of resolution based on a wide dynamic range, high detective quantum efficiency (DQE), and modulation transfer function (MTF), compared with film/screen(F/s). Unlike expectation that a low level of radiation can be used in examination, high level of signal to noise ratio(SNR) due to over-exposure caused increase of exposed dose to patients. Also, the auto exposure control (AEC) using Kilovolage(kVp) in F/S can cause over-exposure. Hence, in this study, we proposed a proper method for using DR, in which effect of tubing Kilovolage on device's image, DR MTF measurement with changes of tubing current (mA), and the quantitative evaluation of skull phantom captured images' PSNR were evaluated. Changes of contrast with tubing Kilovolage can be improved by retouching, and MTF changes according to tubing current(1.41~1.39 lp/mm in 50% area, and 3.19~2.8 lp/mm in 10% area) does not influence on resolution of image. As a result, high tubing Kilovoltage, and tubing current will be suitable to use of DR.
Keywords
Digital radiography(DR); Dose; Image quality;
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