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AJNR - American Journal of Neuroradiology

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Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images

Jeffrey S. Stafira^a, Jagadeesh R. Sonnad^a, William T. C. Yuh^a, David R. Huard^a, Robin E. Acker^a, Dan L. Nguyen^a, Joan E. Maley^c, Faridali G. Ramji^a, Wen-Bin Li^a and Christopher M. Loftus^b

^a Department of Radiological Sciences, University of Oklahoma Health Sciences Center, Oklahoma City
^b Neurosugery, University of Oklahoma Health Sciences Center, Oklahoma City
^c Department of Radiology, the University of Iowa College of Medicine, Iowa City

View larger version (67K): [in a new window]   FIG 1. A and B, CT myelograms. The reviewers were inconsistent in judging stenosis on CT myelograms, and degree of stenosis ranged from mild to severe (A), except in those levels with the most obvious severe stenosis (B).

View larger version (64K): [in a new window]   FIG 2. A, Sagittal T2-weighted MR image demonstrates stenosis at the C4–5, C5–6, and C6–7 levels. The reviewers were inconsistent in determining the level with the most severe stenosis because of multilevel involvement. B, Axial gradient-echo MR image. On the basis of this image and the sagittal image (A), degree of stenosis judged by the reviewers was inconsistent and ranged from mild to severe in this case.