改善/Improvement
- 优化Restful api集成方式，第一次加载速度提升5%以上，第二次加载速度提升10%以上，同时优化缓存空间：空间节省2.5倍左右（相对于无压缩dicom文件）/Optimize the Restful api integration method, increase the loading speed by 5% or more for the first time, increase the second-time loading speed by more than 10%, and optimize the cache storage space: the space is saved by about 2.5 times (relative to the uncompressed dicom file)
Bug fix
- 解决如果前端下载dicom文件失败，导致序列暂停下载的问题/Solve the problem that if the front end downloads the dicom file failed, it causes the series to pause the download
- 解决当前Viewer不允许切换到某个应用，如MPR，而快捷键仍然可以切换的问题/Solve the problem that the current Viewer does not allow to switch to an application, such as MPR, but the shortcut can still be switched
