目的 探讨多层螺旋CT(multislice spiral computed tomography, MSCT)骨三维重建在诊断肋骨及肋软骨骨 折中的应用价值。方法 选取43例胸部外 伤患者为研究对象，均行多层螺旋CT扫 描，运用容积重建(volume rendering， VR)、最大密度投影(maximum intensity projection, MIP)、多平面重建(multi planar reconstruction, MPR)三维重建 肋骨及肋软骨，并与常规CT平扫对比， 分析MSCT三维重建的诊断优势。结果 43 例肋骨骨折，共122根；其中单发骨折占 30.23%，多发骨折占69.77%；肋骨骨折 腋段较为常见，占95.65%；15例肋软骨 骨折，共23根；MSCT检出24例外伤后并 发症。MSCT三维重建技术诊断肋骨及肋 软骨骨折的准确率为98.36%、95.65%， 显著高于CT平扫的72.95%、13.04%，差 异具有统计学意义(P＜0.05)。结论 MSCT 临床诊断肋骨及软骨骨折的准确率较 高，可作为诊断该疾病的理想影像学方 法。

Objective To explore the application value of multi-slice spiral CT (MSCT) three-dimensional (3D) bone reconstruction on the diagnosis of rib and rib cartilage fractures. Methods Forty-three cases of patients with chest injury were treated as the study objects. All of them underwent multi-slice spiral CT scanning. Volume rendering (VR), maximum intensity projection (MIP) and multi planar reconstruction (MPR) were used for 3D reconstruction of ribs and rib cartilage. Compared with routine CT scan, the diagnostic advantages of MSCT 3D reconstruction were analyzed. Results Fortythree cases had rib fractures, a total of 122 ribs. Single fractures accounted for 30.23% and multiple fractures accounted for 69.77%; The axillary segment of rib fracture was common, accounting for 95.65%, 15 cases had rib cartilage fractures, a total of 23, 24 cases were detected with complications by MSCT. The accuracy rate of MSCT 3D reconstruction in the diagnosis of rib and rib cartilage fractures (98.36%, 95.65%) were significantly higher than those of CT scan (72.95%, 13.04%) (P＜0.05). Conclusion The accuracy of MSCT in the diagnosis of rib and cartilage fractures is high. It can be used as an ideal imaging method for the diagnosis of the disease.