黄韧带肥厚的MRI诊断

目的　评价MRI对黄韧带肥厚的诊断价值。方法　 46例HLF中 ,男 2 4例 ,女 2 2例 ;采用SE序列 :T1WI ;FSE序列 :T2 WI ;常规行矢状位加轴位扫描。 3 2例经手术病理证实 ,余CT扫描证实。结果　黄韧带肥厚以多发者最常见 ,颈、胸、腰部病变主要分布在C4～ 7,T9～ 12 、L3～ 5水平 ,在各组中分别占 86.9%、91.6%、85 .7% ;于T2 WI显示最清楚 ,特别是旁正中矢状层面 ;为椎管后缘向前凸的三角形或结节状低信号 ,其中 4例为等信号。在T1WI上 ,检出率仅为 5 6.5 %。结论　HLF是致椎管狭窄的常见原因 ,主要与韧带退变有关 ,在矢状T2 WI上显示最佳。

MRI Diagnosis of Hypertrophy of Ligamentum Flavum

Objective To evaluate the usefulness of MRI in diagnosis of hypertrophy of ligamentum flavum (HLF). Methods Sagittal plus axial scanning on SE (T 1WI) and FSE (T 2WI) sequence were performed in 46 cases (24 males and 22 females),in which 32 cases were confirmed by operation and pathology,others by CT. Results Multiple lesions of HLF were shown the commonest in these cases.Lesions on the cervical,thoracic and luminal vertebra were mainly located at C 4 7 ,T 9 12 ,L 3 5 ( 86.9% , 91.6% ,85.7%,respectively).HLF could be found clearer on T 2WI,especially on paramesial sagittal segment.It was recognized as triangle or nodular low signal intensity and located in the posterior margin of vertebral canal on MRI.Only were 56.5% patients of the cases detected on T 1WI. Conclusion HLF was recognized as one of the most common causes of stricture of vertebral canal,it was associated with the ligament degeneration and was shown clearly on the sagittal T 2WI.