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目的探讨多层螺旋CT(MSCT)后处理技术在下颌骨髁突骨折中的临床诊断价值。方法51例均经MSCT横断面扫描后进行多平面重建(MPR)、表面遮盖显示(SSD)及容积再现技术(VR)。结果髁突骨折仅有骨折线,未发生移位19例,髁突骨折移位32例。轴位CT可明确显示骨折情况并可清楚显示细小骨折及骨折周围软组织改变情况。MPR冠状及矢状重建可显示髁突移位方向。VR可提供下颌骨髁突三维立体改变,SSD可显示骨折全程走行,骨折位置。髁突矢状骨折9例,轴位CT表现为髁突由一间隙分为内外2部分,冠状位或斜冠状位MPR表现为髁突分叉。结论髁突骨折可在横轴位CT扫描基础上,根据伤情及目的不同,选择重建组合,能较全面的评价髁突骨折。
Objective To investigate the clinical value of multislice spiral CT (MSCT) postprocessing in the diagnosis of mandibular condylar fractures. Methods Fifty-one patients underwent multiplanar reconstruction (MPR), surface occlusion display (SSD) and volume rendering (VR) after MSCT cross-sectional scanning. Results Only condylar fracture fracture line, there was no shift in 19 cases, 32 cases of condylar fracture displacement. Axis CT can clearly show the fracture and can clearly show the small fractures and soft tissue around the fracture changes. MPR coronal and sagittal reconstruction can show the direction of condylar shift. VR can provide three-dimensional mandibular condyle changes, SSD can show the entire fracture line, fracture location. Condylar sagittal fracture in 9 cases, the axial CT showed a condyle by a gap is divided into two parts, the coronal or oblique coronal MPR showed condylar bifurcation. Conclusion Condyle fractures can be based on the axial CT scan, according to the injury and the purpose of different, select the reconstruction combination, can more comprehensive evaluation of condylar fractures.