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http://dx.doi.org/10.17946/JRST.2022.45.2.103

Evaluation of Image Quality according to Insert Position and Thickness Change by Fabricating Modified ACR Phantom in Mammography  

Uhm, Hyon-Ja (Department of Radiological Science, Graduate School of Public Health and Social Welfare, Jeonju University)
Park, Chanrok (Department of Radiological Science, Graduate School of Public Health and Social Welfare, Jeonju University)
Publication Information
Journal of radiological science and technology / v.45, no.2, 2022 , pp. 103-109 More about this Journal
Abstract
To maintain improved image quality in mammography, the quality control process is performed using the ACR (American college of radiology) phantom. In addition, many studied were performed by fabricating the customized breast phantom to provide more information in mammography. Thus, the purpose of this study was to evaluate the image quality by designing the modified ACR phantoms. The five modified acrlylic ACR phantoms were designed by considering insert position and phantom thickness. The phantoms were consisted of 4.5, 3.0, and 1.5 cm in terms of phantom thickness, and 3.0, 2.0, and 0.5 cm in terms of insert position, respectively. The acquired images were evaluated by PSNR (peak signal to noise ratio), RMSE (root mean square error), CC (correlation coefficient), CNR (contrast to noise ratio), and COV (coefficient of variation). Based on the similarity analysis, the result is suitable between conventional and new designed phantoms. In addition, the CNR and COV results in terms of insert position showed that image quality for 0.5 cm was 2.3 and 27.4% improved compared with 2 and 3 cm, respectively. According to phantom thickness results, the CNR result for 1.5 cm and COV result for 4.5 cm were 50.1 and 62.7% improved compared with that those conditions. In conclusion, we confirmed that the image quality depends on the breast size and thickness through modified ACR phantom study.
Keywords
ACR (american college of radiology) phantom; Breast cancer; Mammography; Quality control; Quantitative analysis;
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