多PC机存储系统——医学影像存储与传输系统海量存储解决方案

目的：根据医学数字化影像自身的特点以及医学本身对医学影像管理的特殊需要，建立高性能价格比、可扩展性好、较为安全可靠的海量图像存储系统。方法：搭建相应的软硬件环境，组成“ 多PC机存储系统”(mulit personal computer storage system,简称MPCSS），通过医学影像存储与传输系统的控制，实现图像数据由主服务器归档到存储PC机之中；对存储PC机上的数据进行备份；模拟存储PC机数据丢失，使用备份进行恢复；对MPCSS进行扩展，提高存储容量。结果：MPCSS配合相应软件顺利实现图像海量存储、备份、错误恢复、容量扩展。从MPCSS调用影像平均速率为27．7Mbit/s(1byte=8bit)；平均存储成本为74元人民币／G；抽查MPCSS中100例病人187次检查的影像数据，仅发现在试用阶段的6次检查不能正常调用，其他均可正常调用；平均备份、恢复速率为5．5Gbyte/h。结论：MPCSS同目前的高容量存储设备和存储方案相比，虽然在可靠性方面较以昂贵的磁盘阵列为介质的存储方案略逊一筹，但MPCSS为高性能价格比，可扩展性好的海量存储系统，并符合医学数字化影像的自身特点，以及医院本身对医学影像管理的特殊需要。

Mulit personal computer storage system: the solution of PACS storage

Objective According to the characteristics of digital medicine and demand of digitized management in hospital, we establish a storage system which is cheap, highly expansible, and reliable. Methods The multi personal computer storage system (MPCSS) was constructed by assembling the hardwares and softwares. The image data were archived from major server to storage PC by using NEUSOFT PACS archiving manage system and backuped on storage PC. We simulated the situation that the data on storage PC was lost and restored the data. We also expanded the storage system to enlarge its capacity. Results Average transfer rate from MPCSS was 27 7 Mbit/s (1 byte=8 bit); average cost for this system was 74 RMB/G; six cases in the 187 repeated reading of 100 patients failed. MPCSS can store backup and restore the image data, and can expand the storage size. Conclusion MPCSS is very cheap compared with other high capacity systems or devices. It is feasible and suitable for digital image storage.