感染性脊柱炎的MRI表现

Diagnosis of infectivity rachitis on low field strength MR imaging

目的探讨感染性脊柱炎在低场强MR的信号特征及其诊断与鉴别诊断价值。方法收集42例感染性脊柱炎的低场强MR图像,分析其信号特征。结果42例病变中39例累及多椎体,3例累及单椎体。42例中35例病变呈不均匀长T1、长T2信号为主,在T2、W1上可见条片状低信号,7例呈均匀长T1、长T2信号;在STIR及TSHIRT脂肪抑制序列上所有病变均呈不均匀高信号。静脉注射Gd-DTPA后所有病灶呈轻至中度不均匀强化,35例脊柱结核中有20例表现为边缘强化,29例脊柱结核及3例真菌感染的椎间盘均有不同程度的破坏。26例椎体结核存在寒性脓疡。结论低场强MRI可以发现感染性脊柱炎中椎体及其周围组织受累情况,结合临床,部分病例可作出定性诊断。

Objective To discuss the signal character and diagnosis and difference diagnosis of infectivity rachitis on low field strength MR Imaging, Methods 42 cases of infectivity rachitis with low field strength MRI were collected. To analyze the signal characterize, Results 39 cases involved multi-vertebrae, 3 cases single-vertebrae. 35 cases displayed unhomogencous long T1 and long T2 signal intensity with, 7 cases homogeneous signal intensity. All Lesions displayed unhomogencous high signal intensity on STIR and TSHIRT. 20 cases of 35 tuberculosis of spine displayed contrast enhance in margin of lesion. Intervertebral discs were destructive in 29 tuberculosis of spine and 3 mycotic infection of vertebral body. 26 tuberculosis of spine pressented cold abscess. Conclusion Low field strength MR Imaging could display involving status of vertebral body and adjacent tissue. Same cases could he diagnosed qualitatively.