diff --git a/IRaCIS.Core.Application/TestService.cs b/IRaCIS.Core.Application/TestService.cs
index ddc54ae51..9c061d9cb 100644
--- a/IRaCIS.Core.Application/TestService.cs
+++ b/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);