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Radiology, Vol 193, 165-171, Copyright © 1994 by Radiological Society of North America

ARTICLES

Use of magnetization transfer for improved contrast on gradient-echo MR images of the cervical spine

DA Finelli, GC Hurst, BA Karaman, JE Simon, JL Duerk and EM Bellon
Department of Radiology, Metro-Health Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH 44109-1998.

PURPOSE: To evaluate whether magnetization transfer (MT) can improve image contrast on gradient-recalled echo (GRE) magnetic resonance (MR) images of the cervical spine. MATERIALS AND METHODS: Sagittal and axial two-dimensional conventional GRE and MT GRE images were obtained in 103 patients with degenerative disk disease or intrinsic cord lesions. The contrast-to-noise ratios (C/Ns) for the cervical spinal cord and cerebrospinal fluid (CSF) were compared for images obtained at various MT power level and section-select flip angle combinations. Axial three- dimensional GRE images were also obtained with application of MT and C/N evaluated in 10 additional patients. RESULTS: Tailored two- dimensional MT GRE images, obtained with a moderate MT power level and a section-select flip angle similar to the Ernst angle for CSF, provided an average of 2.2-2.4-fold improvement in spinal cord-CSF C/N than conventional GRE images (P < .001). CONCLUSION: The MT GRE images demonstrated superior delineation of disk herniations, foraminal stenosis, and intrinsic cord lesions over conventional GRE and T2- weighted spin-echo images in clinical cervical spine examinations.


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