Objective To explore dual source CT findings and its application value of bone graft fusion after anterior cervical fusion with titanium mesh cage. Methods Thirty-one patients were scanned by dual source CT 3~12 months after anterior cervical fusion with titanium mesh cage and bone graft fusion. The monoenergetic software and multi-planar reconstruction were used to post-process to observe bone grafts density and trabecular bone around bridging. Fifteen patients of the same surgical approach served as control group were scanned by general multi-slice CT. Results The cervical monoenergetic imaging of dual source CT was superior to imaging of general multi-slice CT. Metal artifacts in monoenergetic imaging of dual source CT disappeared, and the osseous structures of bone grafts and those around titanium mesh were clearly displayed. Bone graft fusion appeared as bone grafts uniform density and to be same density gradually with adjacent vertebrae. The trabecular bone around bridging was displayed between bone grafts or they had merged into one. Bone bridge through titanium mesh was displayed at the front or side of verte-bral body without spaces between bone grafts and cervical endplate. Conclusion Monoenergetic imaging of dual source CT can objectively reflect the survived and fusion state of bone grafts in cervical titanium mesh cage. It is of great value to observe bone graft fusion after anterior cervical fusion.%目的：探讨颈椎钛网植骨融合术后植骨融合的双源CT表现及其应用价值。方法31例颈椎钛网植骨融合术患者，术后3~12个月行双源CT双能量扫描，利用单能谱成像及MPR后处理观察植骨的密度及其周围的骨小梁桥接。15例相同术式患者行普通螺旋CT扫描作为对照组。结果颈椎双源CT扫描图像明显优于普通螺旋CT，其金属伪影基本消除，植骨及钛网周围骨质结构显示清晰。植骨融合表现为植骨密度均匀并与邻近椎骨趋于一致，植骨间见连续骨小梁桥接或融为一体，椎体前、侧方出现穿过钛网孔的骨桥连接，椎体终板与植骨界面未出现间隙。结论双源CT单能谱成像能客观评价颈椎钛网融合器内植骨成活及融合状态，对植骨融合的观察具有重要价值。
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