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Journal of the Korean Academy of Rehabilitation Medicine 1998;22(1):56-62.
Correlation of Magnetic Resonance Imaging of Lumbar Herniated Intervertebral Disc with Operative Findings.
Jang, Jin , Lim, Oh Kyung , Ha, Tae Ho , Choi, Moo Rim
Department of Rehabilitation Medicine, Chung Ang Gil Medical Hospital.
요추 추간판 탈출증에서의 자기공명영상소견과 수술소견과의 비교
장진, 임오경, 하태호, 최무림
중앙길병원 재활의학과
Abstract

Magnetic resonance imaging(MRI) is clearly more reliable than computer tomography and myelography in radiological diagnosis of lumbar herniated intervertebral disc. Moreover, MRI can also detect degenerative changes of intervertebral discs. The purpose of this study was to determine the utility and accuracy of MRI in conjuntion with the diagnosis of lumbar herniated intervertebral disc and to compare findings with operative findings.

Comparisons of operative findings and MRI were done in 133 cases. Each patients had been diagnosed by MRI as having lumbar herniated intervertebral disc. MRI findings included those of spin echo T1-weighted images and T2-weighted images, gradient echo T1-weighted images and T2-weighted images, and gadolinium-DTPA enhancement when needed.

In 32 protrusion disc cases diagnosed by MRI, 28 cases were confirmed by operation and four were actually extrusion disc. In 77 cases diagnosed by MRI as extrusion disc, 72 cases were confirmed by operative findings, while 5 cases were found to be protrusion disc. 4 cases of sequestration disc diagnosed by MRI were confirmed by operative findings. Specific dimensions of MRI use yielded the following results: protrusion disc indicated 84.8% in sensitivity, 95% specificity, 87.5% in accuracy; extrusion disc showed 94.7%, 86.5%, 93.5%, respectively; and sequestration disc revealed 100% in all categories. In this study, the average accuracy of lumbar herniated intervertebral disc diagnosed by MRI was 93.6% on average.

Accordingly, MRI has shown itself to be a good diagnostic tool for determining anatomical and biological change in lumbar herniated intervertebral disc.

Key Words: Lumbar herniated intervertebral disc, Magnetic resonance imaging(MRI), Sensitivity, Specificity, Accuracy


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