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Long-term storage of imaging data in hospital picture archiving communication system

LIU Zhong-ming 1, WANG Fang 2, ZHENG Xiao-lin 3 ( 1Division of Scientific Research Affairs, 2Department of Informatics, Southwest Hospital, Third Military Medical University, Chongqing 400038; 3College of Bioengineering, Chongqing University, Chongqing 400044, China)  
Objective To find a solution to the long-term storage of enormous amount of imaging data in hospital picture archiving communication system (PACS). Methods Medical imaging data collected by devices of Digital Imaging and Communications in Medicine-3 (DICOM3) and non-DICOM3 were transformed into the storage format, metadata instance, and expression pattern of digital images standardized by DICOM3. Based on the requirements of data utilization and storage system and the optimal principle of function and value, the reasonable flow of imaging data in PACS network were scientifically allocated by application of on-line, near-line, and off-line storage patterns and by reasonable allocation of the volume and clusters of storage devices. Results The PACS storage system established by our method, characterized by super capacity of error tolerance, permanent unrestricted storage, quick in retrieval, and quick, convenient and reliable in storage and reading, could meet the requirements of long-term storage and management of enormous amount of medical imaging data. Conclusion Grading storage is the effective method for long-term storage of enormous amount of medical imaging data in PACS.
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