| Autor: |
Karson TH; Department of Cardiology, Cleveland Clinic Foundation, OH 44195, USA., Zepp RC, Chandra S, Morehead A, Thomas JD |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography [J Am Soc Echocardiogr] 1996 Nov-Dec; Vol. 9 (6), pp. 769-78. |
| DOI: |
10.1016/s0894-7317(96)90467-8 |
| Abstrakt: |
A large interobserver and intraobserver variability study was performed comparing both digitally compressed and uncompressed echocardiographic images with the same images recorded onto super-VHS video-cassette tape (the current standard). In a blinded, randomized fashion, 179 observers scored the diagnostic and image quality of 20 pairs of echocardiographic loops representing various pathologic conditions. Overall, the digital images were preferred to the S-VHS images both for image quality and diagnostic content (p < 0.0001) regardless of the background or experience level of the observer. Furthermore, uncompressed digital images and those compressed by the Joint Photographic Experts Group (JPEG) algorithm at ratios of 20:1 were judged equivalent. These findings show that digital compression may be used routinely in echocardiography, resulting in improved image and diagnostic quality over present standards. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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