diff --git a/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs b/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
index 4533649ff..b53f43913 100644
--- a/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
+++ b/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
@@ -1057,7 +1057,7 @@ namespace IRaCIS.Core.API.Controllers
                             Log.Logger.Warning($"处理文件{study.StudyCode}DIR失败: {ex.Message}");
                             continue;
                         }
-                      
+
 
                         // ---------- IMAGE FILES ----------
                         foreach (var series in study.SeriesList)
@@ -1085,7 +1085,7 @@ namespace IRaCIS.Core.API.Controllers
                                     {
                                         #region 将多帧合并为一帧
 
-                
+
 
                                         try
                                         {
@@ -1125,7 +1125,20 @@ namespace IRaCIS.Core.API.Controllers
                                         catch (Exception ex)
                                         {
 
-                                            Log.Logger.Warning($"处理多帧合并{instance.Path}失败: {ex.Message}");
+                                            Log.Logger.Warning($"处理多帧合并{instance.Path}失败,以原始文件下载: {ex.Message}");
+
+                                            try
+                                            {
+                                                await using var source2 = await _oSSService.GetStreamFromOSSAsync(instance.Path);
+
+                                                await source2.CopyToAsync(entryStream, 32 * 1024, abortToken);
+                                            }
+                                            catch (Exception ex2)
+                                            {
+
+                                                Log.Logger.Warning($"原始文件下载{instance.Path}失败: {ex2.Message}");
+                                            }
+                                           
                                         }
 
                                         #endregion
@@ -1176,7 +1189,7 @@ namespace IRaCIS.Core.API.Controllers
                 // ✅ HttpConnection.ContentLengthReadStream 已知问题
                 Log.Logger.Warning($"Stream aborted: {ex.Message}");
             }
-            catch (Exception ex) 
+            catch (Exception ex)
             {
                 // ✅ HttpConnection.ContentLengthReadStream 已知问题
                 Log.Logger.Warning($"异常: {ex.Message}");
@@ -1771,7 +1784,7 @@ namespace IRaCIS.Core.API.Controllers
                                     // 获取 Pixel Data 标签
                                     var pixelData = DicomPixelData.Create(dicomFile.Dataset);
 
-         
+
                                     //获取像素是否为封装形式
                                     var syntax = dicomFile.Dataset.InternalTransferSyntax;
 
@@ -1804,7 +1817,7 @@ namespace IRaCIS.Core.API.Controllers
 
                                         Log.Logger.Warning($"处理多帧合并{instance.Path}失败: {ex.Message}");
                                     }
-                               
+
                                     #endregion
 
                                     await dicomFile.SaveAsync(entryStream);
@@ -1857,7 +1870,7 @@ namespace IRaCIS.Core.API.Controllers
         public async Task<IActionResult> VisitImageDownload([FromServices] IPatientService _patientService, [FromServices] IOSSService _oSSService,
       [FromServices] IHubContext<DownloadHub, IDownloadClient> _downLoadHub,
       [FromServices] IRepository<Trial> _trialRepository,
-    [FromQuery]  VisitImageDownloadCommand inCommand)
+    [FromQuery] VisitImageDownloadCommand inCommand)
         {
             var rusult = await _patientService.GetDownloadSubjectVisitStudyInfo(inCommand);
 
@@ -2030,6 +2043,18 @@ namespace IRaCIS.Core.API.Controllers
                                         {
 
                                             Log.Logger.Warning($"处理多帧合并{instance.Path}失败: {ex.Message}");
+
+                                            try
+                                            {
+                                                await using var source2 = await _oSSService.GetStreamFromOSSAsync(instance.Path);
+
+                                                await source2.CopyToAsync(entryStream, 32 * 1024, abortToken);
+                                            }
+                                            catch (Exception ex2)
+                                            {
+
+                                                Log.Logger.Warning($"原始文件下载{instance.Path}失败: {ex2.Message}");
+                                            }
                                         }
 
                                         #endregion