三维CT在颅底影像诊断中的应用

Diagnosis of skull base dieases using three dimensional computed tomography

目的 探索三维 Ｃ Ｔ 成像在颅底中的应用价值。方法 对２５ 个病例的颅底行 Ｃ Ｔ横断扫描，采用表面阴影显示（ Ｓ Ｓ Ｄ）法进行颅底骨三维重建，分析病变引起颅底骨质改变在三维重建图像上的表现。结果 ４ 例颅底骨折的三维重建提供了更多的骨折征象。１５ 例颅底病变术前或术后三维重建为手术方案制定、术后评价、随访及进一步治疗提供了客观真实的立体参考资料。６ 例三叉神经痛射频治疗过程中三维重建有利于制定更安全可靠的穿刺进针线路。结论 在二维 Ｃ Ｔ 基础上的三维成像对检查解剖结构复杂而不规则的颅底是非常有意义的 。

Objective To explore the value of three dimensional (3D) computed tomography (CT) to diseases of the skull base.Methods Twenty five cases with various skull base diseases were examined with 3D CT.All cases received surface shaded display (SSD) method for reconstruction and analysis of 3D reconstruction images in showing the change of skull base bones.Results In 4 cases with skull base fractures,3D CT demonstrated the fracture lines which were not showed by skull plain films,and provided more informations than those in axial scans.In 15 cases with skull base diseases and 6 cases with trigeminal neuralgia,3D CT helped plan the preoperative approach or the postoperative follow up evaluation,treatment. Conclusion 3D CT which based on two dimensional CT scan was very useful for skull baseimaging.