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http://dx.doi.org/10.17946/JRST.2018.41.5.457

Comparison of Noise Power Spectrum in Measurements by Using International Electro-technical Commission Standard Devices in Indirect Digital Radiography  

Min, Jung-Whan (Department of Radiological technology, Shingu University)
Jeong, Hoi-Woun (Department of Radiological Science, Baekseok Culture University)
Kim, Ki-Won (Department of Radiology, Hanil General Hospital)
Kwon, Kyung-Tae (Department of Radiological Science, The Dongnam University)
Jung, Jae-Yong (Department of Radiation Oncology, Sanggye Paik Hospital)
Son, Jin-Hyun (Department of Radiological technology, Shingu University)
Kim, Hyun-Soo (Department of Radiological technology, Shingu University)
Publication Information
Journal of radiological science and technology / v.41, no.5, 2018 , pp. 457-462 More about this Journal
Abstract
The purpose of this study was to compare image quality of indirect digital radiography (IDR) system using the International Electro-technical Commission standard (IEC 62220-1), and to suggest the analysis of noise power spectrum (NPS) which were applied to IEC 62220-1 in medical imaging. In this study, Pixium 4600 (Trixell, France) which is indirect flat panel detector (FPD) was used. The size of image receptor (IR) is $7{\times}17$ inch (matrix $3001{\times}3001$) which performed 14bit processing and pixel pitch is $143{\mu}m$. In IEC standard, NPS evaluation were applied to RQA3, RQA5, RQA7 and RQA9. Because of different radiation quality, each region of interesting (ROI) were compared. The results of NPS indicated up to $3.5mm^{-1}$ including low Nyquist frequency. RQA5 indicated the lowest NPS and the others indicated higher NPS results relatively. NPS result of ROI a38 was higher than ROI a92 and this result indicated that there are more noise in left (cathode) than right (anode). This study were to evaluate NPS by using different radiation quality and setting the each ROI, and to suggest the quantitative methods of measuring NPS.
Keywords
Noise Power Spectrum; Indirect Flat Panel Detector; Region of Interest; Nyquist Frequency; Noise;
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Times Cited By KSCI : 5  (Citation Analysis)
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