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http://dx.doi.org/10.5392/JKCA.2015.15.07.289

Evaluation of Image Quality for Radiographic Positioning using IEC Radiation Quality in the Digital Radiography System  

An, Hyeon (부산가톨릭대학교 대학원 방사선학과)
Kim, Changsoo (부산가톨릭대학교 보건과학대학 방사선학과)
Kim, Jung-Hoon (부산가톨릭대학교 보건과학대학 방사선학과)
Publication Information
The Journal of the Korea Contents Association / v.15, no.7, 2015 , pp. 289-299 More about this Journal
Abstract
The purpose of this study is to evaluate and compare the quality of digital X-ray imaging system. The image quality evaluation was conducted By using Modulation transfer function indicating the quantitative resolution of the image and the noise power spectrum showing the noise characteristics. Using a IEC61267 radiation quality was applied to the geometry to be used in clinical and geometry presented in IEC62220-1 and Additional filter, grid, the clinical dose and the MTF value of edge phantom was measured. Result of the MTF corresponding to each item(Grid, Filter, SID, kVp, mAs), the clinical condition 100cm, 180cm, measurements of the spatial frequency of the MTF IEC62220-1Geometry 150cm became similarly apparent, rather spatial frequency was also the case high in clinical conditions 100cm. NPS results, as the dose(mAs) is increased, NPS showed that reduced. The image quality evaluation using IEC61267 the Radiation quality, Image quality of the video using the clinical conditions Geometry than image quality evaluation using IEC62220-1Geometry was better. It shows that MTF and NPC in IEC and clinical condition were not significantly different. In order to apply the evaluation method of image quality applied with clinical conditions rather than the future method, to be presented evaluation of IEC standard, based on the results of the image characterization studies in this paper, the methods that shows good quality of spatial resolution and decrease NPS value as the least dose, used suitable parameters for whether or not using added filter, grid, change SID and clinical quality(kVp), dose(mAs) etc should be found. then It is believed to be able to properly maintain the actual quality of the image of the digital radiographic imaging system in clinical.
Keywords
IEC Radiation Quality; MTF; NPS;
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Times Cited By KSCI : 3  (Citation Analysis)
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