重新造bot，方便下载的时候识别具体帧

IRC.Core.SCP/Service/CStoreSCPService.cs

@@ -478,8 +478,37 @@ namespace IRaCIS.Core.SCP.Service
                     // 每个 fragment 固定大小 (64KB 示例，可以自己调整)
                     int fragmentSize = 20 * 1024;
 
-                    if (syntax.IsEncapsulated)
+                    //var numberOfFrames = dicomFile.Dataset.GetSingleValueOrDefault(DicomTag.NumberOfFrames, 1);
+
+                    var frag = dicomFile.Dataset.GetDicomItem<DicomOtherByteFragment>(DicomTag.PixelData);
+
+                    int fragmentCount = frag.Fragments.Count();
+
+                    var originOffsetTable = frag.OffsetTable; //有可能没有表，需要自己重建
+
+                    var bot = new List<uint>();
+
+                    uint botOffset = 0;
+
+                    if (syntax.IsEncapsulated && fragmentCount == pixelData.NumberOfFrames)
                     {
+                        //// ① 先复制 Dataset（非常关键）
+                        //var newDataset = dicomFile.Dataset.Clone();
+
+                        //// ② 从“旧 dataset”读 PixelData
+                        //var srcPd = DicomPixelData.Create(dicomFile.Dataset);
+
+                        //// ③ 在“新 dataset”中创建新的 PixelData
+                        //var dstPd = DicomPixelData.Create(newDataset, true);
+
+                        //// ④ 重建 PixelData（自动 BOT）
+                        //for (int i = 0; i < srcPd.NumberOfFrames; i++)
+                        //{
+                        //    var frame = srcPd.GetFrame(i);
+                        //    dstPd.AddFrame(frame);
+                        //}
+
+
                         var newFragments = new DicomOtherByteFragment(DicomTag.PixelData);
 
                         for (int n = 0; n < pixelData.NumberOfFrames; n++)
@@ -488,6 +517,10 @@ namespace IRaCIS.Core.SCP.Service
                             var data = frameData.Data;
                             int offset = 0;
 
+                            bot.Add(botOffset);
+
+                            botOffset += (uint)data.Length; // 累加帧长度
+
                             while (offset < data.Length)
                             {
                                 int size = Math.Min(fragmentSize, data.Length - offset);
@@ -495,10 +528,25 @@ namespace IRaCIS.Core.SCP.Service
                                 Buffer.BlockCopy(data, offset, buffer, 0, size);
 
                                 newFragments.Fragments.Add(new MemoryByteBuffer(buffer));
+
                                 offset += size;
+
                             }
                         }
 
+                        //保留原始偏移表
+
+                        if (originOffsetTable.Count == pixelData.NumberOfFrames)
+                        {
+                            newFragments.OffsetTable.AddRange(originOffsetTable.ToArray());
+
+                        }
+                        else
+                        {
+                            newFragments.OffsetTable.AddRange(bot.ToArray());
+                        }
+
+
                         // 替换原 PixelData
                         dicomFile.Dataset.AddOrUpdate(newFragments);
 
@@ -515,13 +563,13 @@ namespace IRaCIS.Core.SCP.Service
 
 
                     #region 本地测试
-                    //// --- 保存到本地文件测试 ---
-                    //var localPath = @"D:\TestDicom.dcm";
-                    //using (var fs = new FileStream(localPath, FileMode.Create, FileAccess.Write))
-                    //{
-                    //    ms.CopyTo(fs);
-                    //}
-                    //return new DicomCStoreResponse(request, DicomStatus.Success);
+                    // --- 保存到本地文件测试 ---
+                    var localPath = @"D:\TestDicom-5.dcm";
+                    using (var fs = new FileStream(localPath, FileMode.Create, FileAccess.Write))
+                    {
+                        ms.CopyTo(fs);
+                    }
+                    return new DicomCStoreResponse(request, DicomStatus.Success);
 
                     #endregion