A hierarchical storage management (HSM) scheme for cost-effective on-line archival using lossy compression.
A hierarchical storage management (HSM) scheme for cost-effective on-line archival of image data using lossy compression is described. This HSM scheme also provides an off-site tape backup mechanism and disaster recovery. The full-resolution image data are viewed originally for primary diagnosis, then losslessly compressed and sent off site to a tape backup archive. In addition, the original data are wavelet lossy compressed (at approximately 25:1 for computed radiography, 10:1 for computed tomography, and 5:1 for magnetic resonance) and stored on a large RAID device for maximum cost-effective, on-line storage and immediate retrieval of images for review and comparison. This HSM scheme provides a solution to 4 problems in image archiving, namely cost-effective on-line storage, disaster recovery of data, off-site tape backup for the legal record, and maximum intermediate storage and retrieval through the use of on-site lossy compression.
Avrin
D E
DE
Department of Radiology, University of California, San Francisco 94143-0628, USA.
Andriole
K P
KP
Yin
L
L
Gould
R G
RG
Arenson
R L
RL
D000465:Algorithms; D003362:Cost-Benefit Analysis; D006801:Humans; D016249:Optical Storage Devices; D011873:Radiology Information Systems