diff --git a/IRC.Core.SCP/Service/CStoreSCPService.cs b/IRC.Core.SCP/Service/CStoreSCPService.cs
index 469e421c9..19521b61f 100644
--- a/IRC.Core.SCP/Service/CStoreSCPService.cs
+++ b/IRC.Core.SCP/Service/CStoreSCPService.cs
@@ -608,7 +608,7 @@ namespace IRaCIS.Core.SCP.Service
                                 // 生成缩略图
                                 using (var memoryStream = new MemoryStream())
                                 {
-                                    DicomImage image = new DicomImage(request.Dataset);
+                                    DicomImage image = new DicomImage(dicomFile.Dataset);
 
                                     var sharpimage = image.RenderImage().AsSharpImage();
                                     sharpimage.Save(memoryStream, new JpegEncoder());