Comparison of image performance for three compression methods based on digital X-ray system: Phantom study

In general, we used picture achieving and communicating system (PACS) for restoring X-ray images such as a converging optical disk. The data in restoring system is essential for efficient stored X-ray image control. To efficiently compress the X-ray images, joint photographic expert group (JPEG), JPEG 2000 and JPEG extended range (XR) were developed and widely used in diagnostic imaging field. Thus, the purpose of this study was to evaluate image performance using above-mentioned comparison methods with various phantoms based on digital X-ray imaging system. For that purpose, we acquired hand and chest phantom images with computed radiography (CR) using image plate (IP) and adjusted different compression rates. In addition, we used peak signal to noise ratio (PSNR) to compare image performance with three compression methods According to the results, when we used JPEG XR, 24% and 14% more efficient results than JPEG and JPEG 2000 were acquired in hand phantom images, respectively. Also, the PSNR results using JPEG XR were 9% and 12% better than that of JPEG and JPEG 2000 in chest phantom images, respectively. Based on our results, JPEG XR compression method is expected to be very useful in digital X-ray imaging system.