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KMID : 1151820130070010063
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Journal of the Korean Society of Radiology
2013 Volume.7 No. 1 p.63 ~ p.69
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Research on Image Quality and Effective dose by Exposure Index Variation
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Kim Hyun-Soo
Jeong Jae-Ho
Lee Jong-Woong
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Abstract
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Comparing with film-screen system, flat-panel detector has extensive dynamic range. Focusing flat-panel detector, whole body human phantom PBU-50 (Kyoto, kagaku, Japan) was used to perform comparative study of the estimate of image quality and exposure dose. the exposure condition was 81kV and 20mAs, which is used for Abdomen supine exam in clinical area. As a result of the kV change of the interpreted medical image which has over 30dB of PSNR value, the value of DAP shows the difference of 19.6 times. Moreover, the result of comparing kV change with effective dose of ICRP 103 shows that stochastic effect was increased by over exposure. Therefore, it is significantly necessary that digital radiation technical chart will be used to obtain high quality image and make the standard of dose by educating radio-technologist continually.
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KEYWORD
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Exposure Index, Dynamic rang, Effective dose, PSNR, Monte Carlo technique
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