CT薄层扫描诊断臂丛神经损伤的价值

The value of CT with thin slice scan in the diagnosis of brachial plexus injury

目的探讨用高分辨率ＣＴ（ＨＲＣＴ）加薄层扫描观察臂丛损伤病例的椎管内神经根丝健全与否，以对臂丛损伤作出精确诊断。方法选择３１例臂丛损伤病例。５例作脊髓造影后用ＨＲＣＴ作薄层（２ｍｍ）扫描和三维重建，２６例造影后用传统ＣＴ作厚层（５～１０ｍｍ）扫描和分析。结果５例用ＨＲＣＴ薄层扫描和三维重建结果均可以清晰地显示健全和损伤的神经根丝。而２６例ＣＴＭ的厚层扫描结果中仅４例可以模糊地显示部分神经根丝。结论用ＨＲＣＴ结合薄层扫描可以显示神经根丝的变化；用三维重建技术可以显示神经根丝的空间结构。结果提示ＨＲＣＴ加薄层扫描适合对臂丛损伤椎管内根丝的健全与否做精确的术前诊断。

Objective To investigate the value of high resolution CT (HRCT) combined with thin slice scan(2mm)in showing the rootlet of brachial plexus inside the spinal canal Method Five cases were estimated by HRCT combining with thin slice scan and 3D reconstruction after myelography Twenty six cases were scaned by conventional CT with thick slice as control groub Results Five cases by HRCT and thin slice scan all clearly show the rootlets The use of 3D reconstruction can show the spatial structure of rootlet of brachial plexus,whereas only 4 out of 26 cases by conventional CT shows blurred rootlet Conclusion HRCT combined with thin slice scan can show the rootlet inside the spinal canal This results show that HRCT with thin slice scan can be used in the accurate diagnosis of brachial plexus injury