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American Journal of Roentgenology, Vol 153, Issue 2, 393-398
Copyright © 1989 by American Roentgen Ray Society

Articles

Gradient-echo MR imaging of the cervical spine: evaluation of extradural disease

C VanDyke, JS Ross, J Tkach, TJ Masaryk, and MT Modic

Department of Radiology, University Hospitals of Cleveland, OH 44106.

A prospective study was undertaken on 204 consecutive patients comparing low flip angle gradient-echo and T1-weighted spin-echo techniques in the MR evaluation of cervical extradural disease. Four patient groups were studied with varying gradient-echo TEs (6 or 13 msec) and flip angles (10 degrees or 60 degrees). Images were evaluated independently for contrast behavior and anatomy, then directly compared for conspicuity of lesions. The FLASH sequences (especially with a 10 degrees flip angle) produced better conspicuity of disease in half the imaging time. T1-weighted spin-echo sequences were more sensitive to marrow changes and intradural disease. The short TE sequence (6 msec) did not produce any diagnostic advantage over the longer TE sequence (13 msec). A fast and sensitive MR examination for cervical extradural disease combines a sagittal T1-weighted spin-echo acquisition with sagittal and axial FLASH 10 degrees sequences.
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Copyright © 1989 by the American Roentgen Ray Society.