无骨折脱位型颈髓损伤MRI表现和损伤部位表观弥散系数与损伤程度的相关性

Findings of MRI in Cervical Spinal Cord Injury without Fracture and Dislocation and Correlation between Apparent Diffusion Coefficient of Foci and Severity of Injuries

目的探讨无骨折脱位型颈髓损伤患者MRI表现及其损伤部位表观弥散系数(ADC)值与损伤程度的相关性。方法对46例无骨折脱位型颈髓损伤患者和20例正常志愿者行MRI常规和弥散加权成像(DWI)检查。对损伤部位ADC值与Frankel分级进行相关性分析。结果 MRI常规检查,患者中脊髓水肿22例,髓内出血8例,出血水肿混合型14例,无异常表现2例。正常颈髓与损伤颈髓ADC值分别为(1.05±0.12)×10-3mm2/s、(1.21±0.23)×10-3mm2/s(t=0.704,P<0.05)。损伤颈髓ADC值与Frankel分级呈正相关性(r=0.407,P<0.05)。结论常规MRI对诊断无骨折脱位型颈髓损伤有较大诊断价值;ADC值可反应无骨折脱位型颈髓损伤的严重程度。

Objective To study the MRI of cervical spinal cord injury without fracture and dislocation and explore of the apparent diffusion coefficient（ADC） of injured site related to the severity of injury. Methods 46 patients with cervical spinal cord injury without fracture and dislocation and 20 healthy controls were scaned with routine MRI and diffusion weighted imaging. The ADC value of site of injury and grades of Frankel＇s classification were analyze with the correlation. Results There were 22 cases with spinal cord edema, 8 cases with intramedullary hemorrhage, 14 cases with edema and hemorrhage, 2 cases without abnormal finding. The ADC of controls and patients were（1.05±0.12）×10-3mm2/s,（1.21±0.23）×10-3mm2/s（t=0.704, P〈0.05）. The ADC values positively correlated with the grades of Frankel＇s classification（r=0.407, P〈0.05）. Conclusion MRI may help to find the cervical cord injury in those without fracture and dislocation, and the ADC may be resposible to the severity of injury.