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http://dx.doi.org/10.5573/ieie.2014.51.12.163

Development of Automatized Quantitative Analysis Method in CT Images Evaluation using AAPM Phantom  

Noh, Sung Sun (Department of Radiology, Asan Medical Center)
Um, Hyo Sik (Department of Radiology, Asan Medical Center)
Kim, Ho Chul (Department of Radiological Science, Eulji University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.51, no.12, 2014 , pp. 163-173 More about this Journal
Abstract
When evaluating the spatial resolution images and evaluation of low contrast resolution using CT standard phantom, and might present a automated quantitative evaluation method for minimizing errors by subjective judgment of the evaluator be, and try to evaluate the usefulness. 120kVp and 250mAs, 10mm collimation, SFOV(scan field of view) of 25cm or more than, exposure conditions DFOV(display field of view) of 25cm, and were evaluated the 24 passing images and 20 failing images taken using a standard reconstruction algorithm by using the Nuclear Associates, Inc. AAPM CT Performance Phantom(Model 76-410). Quantitative evaluation of low contrast resolution and spatial resolution was using an evaluation program that was self-developed using the company Mathwork Matlab(Ver. 7.6. (R2008a)) software. In this study, the results were evaluated using the evaluation program that was self-developed in the evaluation of images using CT standard phantom, it was possible to evaluate an objective numerical qualitative evaluation item. First, if the contrast resolution, if EI is 0.50, 0.51, 0.52, 0.53, as a result of evaluating quantitatively the results were evaluated qualitatively match. Second, if CNR is -0.0018~-0.0010, as a result of evaluating quantitatively the results were evaluated qualitatively match. Third, if the spatial resolution, as a result of using a image segmentation technique, and automatically extract the contour boundary of the hole, as a result of evaluating quantitatively the results were evaluated qualitatively match.
Keywords
AAPM CT phantom; low contrast resolution; spatial resolution; quantitative evaluation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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