脊柱侧弯畸形MRI检查出现伪影的诊断及鉴别

目的：探讨脊柱侧弯畸形患者MRI检查时横轴位T2WI相中出现的伪影与脊髓纵裂畸形的诊断及鉴别诊断。方法：回顾分析经手术证实的44例脊柱侧弯畸形患者横轴位T2WI相出现的伪影。结果：44例出现T2WI图像伪影的患者，均发生于脊柱侧弯处。其中，6例纵裂伪影均位于胸段脊髓；26例车轮状伪影中24例位于胸段脊髓，2例位于第1腰椎水平段；12例同时出现纵裂伪影及车轮状伪影。纵裂伪影T2WI部分高信号影形态欠规则。车轮状伪影T2WI相表现髓内及椎管内多个裂隙样辐射状高信号。结论：脊柱侧弯患者在MRI检查时T2WI相侧弯处易出现纵裂畸形伪影，应结合MRI多序列、多参数成像进行鉴别，减少误诊。

Scoliosis MRI examination diagnosis and differential of artifacts

Objective:To investigate the artifacts on T2MI phase in MRI examination of patients of scoliosis and deformity of cleft and diagnosis and differential diagnosis of diastematomyelia malformation. Methods:To retrospec-tively analyze the artifacts on axial T2WI phase of 44 patients of scoliosis who were confirmed by operation. Results:All the artifacts occurred in the bend of spinal column side in all 44patients.In these patients,6 cases of diastematomyelia artifacts were located in the thoracic spinal cord, and 24 cases in 26 cases of the wheel shaped artifacts were located in the thoracic spinal cord,2 cases of which were located in the first lumbar vertebra level, and diastematomyelia artifacts and wheel shaped artifacts occurred in 12 cases at the same time. Diastematomyelia artifacts appeared as thready and high signals in spinal cord on T2WI phase, some lines of high signals of which appeared in irregular shape. The wheel shaped artifacts appeared as many stenopaic and radial artifacts on T 2W I phase in spinal cord and spinal canal. Conclusion:It is easy to appear diastematomyelia artifacts at the slide bend on T 2WI phase in MRI examination in pa-tients with scoliosis, so we should make identification with MRI images of multiple sequence to reduce misdiagnosis.