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http://dx.doi.org/10.7742/jksr.2012.6.3.217

Change of Image Quality within Compression of AAPM CT Performance Phantom Image Using JPEG2000 in PACS  

Kwon, Soon-Mu (Department of Radiological Science, The Graduate School of Catholic University of Daegu)
Publication Information
Journal of the Korean Society of Radiology / v.6, no.3, 2012 , pp. 217-226 More about this Journal
Abstract
This study examines image quality of medical image after compression using JPEG2000 for AAPM CT Performance Phantom in PACS. The compressed images of 15:1 showed change of 1.93% and 0.81% in the CT number of water and the slice thickness, respectively, compared to the original images. The variation of the uniformity did not give a correlation for each measured area. In noise measurements at compressions of 10:1 and 15:1, changes of 1.47% to 10.99% were observed, respectively. The noise showed incremation tendency as increasing over the compression ratio 15:1, and the noise of 81.68% was measured at a compression of 40:1. CT number, uniformity, slice thickness, spatial resolution and contrast resolution for the compressed images were slightly changed by increasing the compression ratio. However, the noise was seriously changed relatively at the compressed images. Thus the noise was a important factor to determine the compression ration. A compression ratio of 10:1 for the AAPM CT Performance Phantom image was appropriate and could be applied to diagnostic images.
Keywords
PACS; DICOM; JPEG2000; AAPM;
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