| Comparison of gradient-recalled-echo and T2-weighted spin-echo pulse sequences in intramedullary spinal lesions. | |
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MedLine Citation:
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PMID: 2505509 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nineteen consecutive patients with spinal intramedullary lesions were studied on a 1.5-T system to compare the quality of T2-weighted spin-echo and gradient-recalled-echo (GRE) pulse sequences. Direct comparisons were made in the sagittal and/or axial planes. Twenty-four studies were performed in the 19 patients. The gradient echoes were usually performed at 300/14 (TR/TE) with a flip angle of 10 degrees. Although no significant diagnostic differences were noted in the sagittal plane, there was a distinct anatomic advantage for GRE imaging over spin-echo imaging in the axial plane. This is believed to be the result of CSF time-of-flight effects in the slice-select direction, which are not compensated for by flow-compensating gradients on the spin-echo images, but which are insignificant in the GRE sequence used in this study. Pathology was seen equally well or better on GRE in 79% (19/24) of the sequences. In the other five cases, the spin-echo image showed a brighter intramedullary signal than that seen on GRE, although GRE showed the lesion in all cases. Our results indicate that properly optimized GRE imaging on a high-field-strength system can replace spin-echo imaging in the spine when intramedullary disease is suspected and that the benefits of GRE are most striking in the axial plane. |
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Authors:
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B H Katz; R M Quencer; R S Hinks |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: AJNR. American journal of neuroradiology Volume: 10 ISSN: 0195-6108 ISO Abbreviation: AJNR Am J Neuroradiol Publication Date: 1989 Jul-Aug |
Date Detail:
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Created Date: 1989-10-06 Completed Date: 1989-10-06 Revised Date: 2008-02-14 |
Medline Journal Info:
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Nlm Unique ID: 8003708 Medline TA: AJNR Am J Neuroradiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 815-22 Citation Subset: IM |
Affiliation:
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Department of Radiology, University of Miami School of Medicine/Jackson Memorial Medical Center, FL 33101. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Arachnoiditis / diagnosis Child Female Humans Magnetic Resonance Imaging / methods* Male Middle Aged Multiple Sclerosis / diagnosis Neurofibromatosis 1 / diagnosis Spinal Cord Compression / diagnosis Spinal Cord Diseases / diagnosis* Spinal Cord Neoplasms / diagnosis, secondary Spinal Osteophytosis / diagnosis Syringomyelia / diagnosis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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