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KMID : 0357520170400020197
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Journal of Radiological Science and Technology
2017 Volume.40 No. 2 p.197 ~ p.203
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Evaluation and Comparison of Signal to Noise Ratio According to Histogram Equalization of Heart Shadow on Chest Image
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Kim Ki-Won
Lee Eul-Kyu
Jeong Hoi-Woun
Son Jin-Hyun
Kang Byung-Sam
Kim Hyun-Soo
Min Jung-Whan
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Abstract
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The purpose of this study was to measure signal to noise ratio (SNR) according to change of equalization from region of interest (ROI) of heart shadow in chest image. We examined images of chest image of 87 patients in a University-affiliated hospital, Seoul, Korea. Chest images of each patient were calculated by using ImageJ. We have analysis socio-demographical variables, SNR according to images, 95% confidence according to SNR of difference in a mean of SNR. Differences of SNR among change of equalization were tested by SPSS Statistics21 ANOVA test for there was statistical significance 95%(p < 0.05). In SNR results, with the quality of distributions in the order of original chest image, original chest image heart shadow and equalization chest image, equalization chest image heart shadow(p < 0.001). In conclusion, this study would be that quantitative evaluation of heart shadow on chest image can be used as an adjunct to the histogram equalization chest image.
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KEYWORD
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Chest image , Histogram equalization , Signal to noise ratio , Equalization
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