12例急性脊髓刀扎伤的MRI表现

MRI findings of acute spinal cord stab wound

目的研究急性脊髓刀扎伤的磁共振成像 (MRI)特征。方法对 12例急性脊髓刀扎伤患者的MRI进行回顾性分析。结果 12例均可见入路信号 ,椎管外—椎管内的刀迹金属伪迹影 ;此外 ,亦可见脊髓内的刀迹金属伪迹影、脊髓损伤信号、水肿信号、脊髓出血信号、硬膜外、下血肿出血信号。硬膜下、外血肿的鉴别可通过硬膜在血肿与脊髓间的关系来鉴别 ;矢状T1、T2 加权相可以清晰地显示黄韧带、后纵韧带及硬膜的损伤或断裂。结论MRI可准确诊断脊髓刀扎伤的部位 ,髓内、髓外及韧带、硬膜的损伤 ,尤其是矢状T2 W相可清晰、准确地显示刀扎入的路径。

ObjectiveTo study the MR images findings of acute spinal cord stab wound injury. MethodsThe clinical material and MRI findings of 12 patients with acute spinal cord stab wound injury within 7 days were reviewed retrospectively with 1.0 T magnet. Results4 of 12 patients had the Brown-Sequards's Syndrome, the locations of wound injury are mainly within T 6-8 level. MRI findings of pathway of the stab wound were seen in all cases. Many other signals including artefact of knife track, spinal cord injury, edema, hemorrhage, and hematoma of subdural and epidural were also seen in some cases. The location relationship of the hematoma to dura in distinguishing a subdural hematoma from an epidural hematoma by MR images is important, injury of the ligamentum flavum and anterior and posterior longitudinal ligaments and spinal dura can be diagnosed by either absence or interruption of the normal linear low-signal-intensity band.Conclusions MR images allows vasualization of intramedullary injury, extramedullary injury and injury to spinal ligaments and dura. T 2 -weighted images can be helpful in visualization of the knife track extending from the skin surface to the spinal canal.