CT和MR在颈椎椎体挫伤中的诊断价值

目的探讨CT和MR在颈椎椎体挫伤中的诊断价值。方法搜集39例颈椎椎体挫伤患者的CT及MRI影像资料,测量颈椎挫伤和正常椎体的CT值以及T1WI、T2WI和STIR的相对信号值。数据采用两独立样本t检验和ROC曲线进行统计分析。结果挫伤椎体的T1WI信号强度低于正常椎体,相对T1信号值在两者中的差异有统计学意义(P<0.001);挫伤与正常椎体在T2WI均表现为高信号,相对T2信号值在两者中的差异无统计学意义(P>0.05);挫伤椎体的STIR信号强度高于正常椎体,相对STIR信号值在两者中的差异有统计学意义(P<0.001);挫伤与正常椎体在CT图像上无明显密度差别,CT值在两者中的差异无统计学意义(P>0.05)。基于ROC曲线分析,相对T1信号值、相对STIR信号值和联合相对T1、STIR信号值鉴别两者的准确性分别为74.64%、84.62%和86.5%。结论MR是诊断颈椎椎体挫伤的重要检查,联合T1WI和STIR序列有助于颈椎椎体挫伤的诊断。

Diagnostic Value of CT and MR in Cervical Vertebral Contusion

Objective To investigate the value of CT and MR in cervical vertebral contusion.Methods CT and MRI imaging data of 39 patients with cervical vertebral body contusion were collected.The CT values and the relative signal values of T1WI,T2WI,and STIR on the contusive and normal vertebral body were measured.Two independent samples t-test and receiver operating characteristic analysis were performed.Results The signal intensity of the contusive vertebral body was lower than that of the normal vertebral body on T1WI,and the difference of relative T1 signal values was statistically significant(P<0.001).Both contusive and normal vertebral body exhibited high signal intensity on T2WI,and there was no statistically significant difference(P>0.05).The STIR signal intensity of the contusive vertebral body was higher than that of the normal vertebral body,and the difference of relative STIR signal values was statistically significant(P<0.001).The density between contusive and normal vertebral body showed no significant difference in CT images(P>0.05).The ROC curve analysis indicated that relative T1 signal accuracy,STIR signal,and joint T1 and STIR signal were 74.64%,84.62%,and 86.5%,respectively.Conclusion MR is an important examination for the diagnosis of cervical vertebral contusion.T1WI and STIR sequences were helpful in the diagnosis of cervical vertebral contusion.