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KMID : 1114620120090020122
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Journal of the Korean Society for Breast Screening
2012 Volume.9 No. 2 p.122 ~ p.126
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Evaluation of the Microcalcifications of Indirect Conversion Type Digital Mammography Using CMOS Detector
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Chang Jung-Min
Kim Won-Hwa
Ryu Eun-Bi
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Abstract
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Purpose: The purpose of this study was to evaluate the visibility of microcalcifications and image quality including contrast and noise of the digital mammographic image using indirect conversion CMOS detector, made by domestic manufacturer.
Materials and Methods: We included 46 women who performed routine mammography for screening or diagnostic purpose using domestic test digital mammography, and who had routine mammography images from foreign manufacturer, and finally identified to have microcalcifications. Two breast radiologists used 5 point scale to assess the visibility of microcalcifications and image contrast (5: excellent, 1: poor) and noise (1: abscent, 5: impossible to interpret). For each case, visibility of microcalcifications, image contrast and noise were compared using paired t-test.
Results: The mean scores of visibility of microcalcifications for two radiologists were 4.4 ± 0.9, and 4.5 ± 0.9, respectively. The mean scores of image contrast were 4.4 ± 0.5, and 4.3 ± 0.7; and no significant differences were noted compared to mammography of foreign manufacturer. However, mean scores of noise were 2.1 ± 0.7, and 2.1 ± 0.7 for each radiologist, and significant higher noise score was noted for image noise in domestic mammography.
Conclusion: Digital mammography using indirect conversion CMOS detector made by domestic manufacturer showed optimal visibility for microcalcifications and image contrast compared to foreign vendors. With the effort to reduce noise level, better image quality could be achieved by using domestic digital mammography.
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KEYWORD
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Digital Mammography, Domestic mammographic unit, Image quality, Microcalcifications, CMOS detector
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