Multi personal computer storage system: solution of sea capacity PACS storage

Objective According to the characteristics of digital medicine and the demands of digitalized management in hospitals, we established a storage system that is affordable, highly expandable, and reliable. Methods The multi personal computer storage system (MPCSS) was constructed using hardware and software. The image data were archived from major servers to storage personal computers (PCs) by using Neusoft-picture archiving and communication system (PACS) and backed up on storage PCs. We simulated data loss on storage PCs and then restored the data. We also expanded the storage system to enlarge its capacity. Results The average transfer rate from MPCSS was 27.7 MB/s, and the average cost for this system was $74/GB. In the testing stage, only 6 of 187 instances of data retrieval (from 100 patients) failed. Conclusion The MPCSS is much less expensive than other high capacity systems or devices. It is feasible and suitable for digital image storage.

地震模拟在委内瑞拉Sipororo油田构造解释中的应用

地震模拟和成像是用来验证一个地震剖面构造解释的有利工具，这个剖面来自委内瑞拉一个陆上油田的复杂地质区域。通过分析叠前时间偏移（PSTM）成像问题并结合附近一口井的信息，导出了一个新的构造／速度模型。对合成的地震数据进行叠前时间偏移并重新成像，合成的地震数据来自这个新的模型。通过对比合成数据和实际数据的PSTM成像，验证了新的解释观念，而且确定在PSTM成像中，目标层构造被超覆的逆断层所扭曲，所以不得不用叠前深度偏移（PSDM）来生成精确的构造成像。为了给这个特殊成像目标选择一个适合的PSDM速度模型并建立流程，必须用同样的合成数据来评价不同的PSDM模型建立方法。对基于层析成像的网格和模型流程都进行了评价。通过对比两种不同方法的PSDM成像，得出了以下结论：没有构造表面约束的网格层析成像是不够的，基于模型的速度校正方法对获取目的层的成像是适合的。