有些影响特殊，需要完整的测试

IRaCIS.Core.Application/TestService.cs

@@ -94,6 +94,14 @@ namespace IRaCIS.Core.Application.Service
                 {
                     var stream = await _oSSService.GetStreamFromOSSAsync(item.Path);
 
+                    if (!stream.CanSeek)
+                    {
+                        var ms = new MemoryStream();
+                        await stream.CopyToAsync(ms);
+                        ms.Position = 0;
+                        stream = ms;
+                    }
+
                     var dicomFile = DicomFile.Open(stream);