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Journal of the Korean Academy of Rehabilitation Medicine 2000;24(1):132-136.
Visualization of Disc Degeneration: Comparison between Magnetic Resonance Imaging and Discography.
Ko, Hyun Yoon , Kim, Hoon , Lee, Jong Eun , Shin, Yong Beom , Kim, Hak Jin
1Department of Rehabilitation Medicine, Pusan National University College of Medicine.
2Department of Radiology, Pusan National University College of Medicine.
추간판 변성의 영상화 자기공명영상과 추간판 조영술의 비교
고현윤, 김훈, 이종언, 신용범, 김학진1
부산대학교 의과대학 재활의학교실, 1방사선과학교실
Abstract

Objective
To determine the relationship between magnetic resonance imaging (MRI) and discography in visualization of disc degeneration.


Method
Forty-eight patients with suspected discogenic pain in lumbar spines and degenerative changes of the lumbar intervertebral discs in T2-weighted magnetic resonance imaging were studied. Five types of discogram (cottonball, lobular, irregular, fissured, and ruptured) were classified by identifiable features in shape and density of radio-opaque shadow. Three types of MRI (bulging, protrusion, and extrusion) were classified by degrees of disc herniation. The correlation between two imaging techniques of lumbar intervertebral discs were analyzed using Spearman's correlation coefficient.


Results
Of sixty-three discs, MRI finding of the disc herniation revealed as follows: bulging, 17 discs; protrusion, 20 discs; extrusion, 26 discs. Discography revealed as follows: cottonball, 15 discs; lobular, 2 discs; irregular, 11 discs; fissured, 10 discs; ruptured, 25 discs. 46 discs of 63 discs showed internal structural abnormalities (irregular, fissured, or ruptured). There was no statistically significant correlation between MRI and discography in visualization of the disc degeneration (r=0.081).


Conclusion
Severity of the lumbar intervertebral disc degeneration in MRI was not correlated with degenerative severity of discographic imaging. Supplementary discography may be useful in evaluation of patients with discogenic pain since discographic imaging when compared to MRI visualizes disc degeneration more accurately.

Key Words: Discography, Discogenic pain, Disc degeneration, Magnetic Resonance Imaging


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