脊髓低位的磁共振成象分析

MRI FINDINGS OF THE TETHERED CORD

本文报道13例脊髓低位的磁共振成象(MRI)。自旋回波(SE)序列、短TR短TE(500/40 ms)、矢状面扫描显示病变最好。短TR短TE(500/30ms)横断面扫描可做为矢状面检查的补充。脊髓低位的MRI表现为:脊髓偏于硬膜囊后部从胸段延续到L_4水平以下,无脊髓圆锥膨大;11例合并神经管闭合不全,其中,脊髓脊膜膨出4例,硬膜内脂肪瘤和脊髓积水2例,腰骶部硬膜囊囊肿5例。

Thirteen patients with tethered cord detected by MRI were reported.They were 6 males 7 famales, aged from 10 months, to 81 years. MRI exami-nation were perfomed on a 0.35 Tesla MR imager with spin-echo sequences.Sagital views with short TR and short TE (500/40ms) could well demonstratea precise anatomic delineation of the cord and its abnormalities. Axial viewswith short TR and short TE (500/30ms) were obtained to show well theanatomical relation of the cord. MRI findings of the tethered cord: 1) Thecord extended as low as to the level below L_4 and ares situated at the posteriorpart of the thecal sac. 2) The spinal dysrhaphism was associated in 11 cases,including 4 patients with myelomeningocele, 2 with intradural lipoma andhydromyelia, 5 with lumbosacal thecal cyst. Two patients had no associatedabnormality.