diff --git a/IRC.Core.SCP/Service/CStoreSCPService.cs b/IRC.Core.SCP/Service/CStoreSCPService.cs
index 8b4201d7d..d41312373 100644
--- a/IRC.Core.SCP/Service/CStoreSCPService.cs
+++ b/IRC.Core.SCP/Service/CStoreSCPService.cs
@@ -480,10 +480,22 @@ namespace IRaCIS.Core.SCP.Service
 
                     if (syntax.IsEncapsulated)
                     {
+
+                        // ====== 新增：BOT 所需数据 ======
+                        var frameOffsets = new List<uint>();
+                        uint currentOffset = 0;
+
+
                         var newFragments = new DicomOtherByteFragment(DicomTag.PixelData);
 
+                        // 先占位 BOT（第 0 个 fragment）
+                        newFragments.Fragments.Add(new MemoryByteBuffer(Array.Empty<byte>()));
+
                         for (int n = 0; n < pixelData.NumberOfFrames; n++)
                         {
+                            // 记录该帧的起始 offset
+                            frameOffsets.Add(currentOffset);
+
                             var frameData = pixelData.GetFrame(n); // 获取完整一帧
                             var data = frameData.Data;
                             int offset = 0;
@@ -496,9 +508,27 @@ namespace IRaCIS.Core.SCP.Service
 
                                 newFragments.Fragments.Add(new MemoryByteBuffer(buffer));
                                 offset += size;
+
+                                currentOffset += (uint)size;
                             }
                         }
 
+                        // ====== 回填 BOT ======
+                        var botBytes = new byte[frameOffsets.Count * 4];
+                        for (int i = 0; i < frameOffsets.Count; i++)
+                        {
+                            // BOT 使用 Little Endian
+                            var bytes = BitConverter.GetBytes(frameOffsets[i]);
+                            if (!BitConverter.IsLittleEndian)
+                            {
+                                Array.Reverse(bytes);
+                            }
+                            bytes.CopyTo(botBytes, i * 4);
+                        }
+
+                        // 用 BOT 替换第 0 个 fragment
+                        newFragments.Fragments[0] = new MemoryByteBuffer(botBytes);
+
                         // 替换原 PixelData
                         dicomFile.Dataset.AddOrUpdate(newFragments);