| Visual and quantitative assessment of lateral lumbar spinal canal stenosis with magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 21969705 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BackgroundLateral lumbar spinal canal stenosis is a common etiology of lumbar radicular symptoms. Quantitative measurements have commonly demonstrated better repeatability than visual assessments. We are not aware of any studies examining the repeatability of quantitative assessment of the lateral canal.PurposeTo evaluate the repeatability of visual assessments and newly developed quantitative measurements of lateral lumbar spinal canal stenosis using magnetic resonance imaging (MRI).Material and MethodsTwenty-eight patients with lateral lumbar spinal canal stenosis or prior spinal surgery with recurrent symptoms were imaged with MRI. A radiologist, a neurosurgeon and a spine research trainee graded visually and quantitatively subarticular (n = 188) and foraminal zones (n = 260) of the lateral spinal canal. Quantitative measurements included the minimal subarticular width and the cross-sectional area of the foramen.ResultsThe repeatability of visual assessment at the subarticular zone and foraminal zones between raters varied from 0.45-0.59 and 0.42-0.53, respectively. Similarly, the intraclass correlation coefficients for the quantitative measurements varied from 0.67-0.71 and 0.66-0.76, respectively. The intra-rater repeatability for the visual assessments of the subarticular and foraminal zones was 0.70 and 0.62, respectively, while the corresponding intraclass correlation coefficients for quantitative measurements were 0.83 and 0.81, respectively.ConclusionInter-rater repeatability of visual assessments of lateral stenosis is moderate, whereas quantitative measurements of both subarticular width and the cross-sectional area of the foramen have substantial reproducibility and may be particularly useful for longitudinal studies and research purposes. The clinical value of these parameters requires further study. |
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Authors:
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Petri Sipola; Ville Leinonen; Riikka Niemeläinen; Timo Aalto; Ritva Vanninen; Hannu Manninen; Olavi Airaksinen; Michele C Battié |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-3 |
Journal Detail:
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Title: Acta radiologica (Stockholm, Sweden : 1987) Volume: - ISSN: 1600-0455 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8706123 Medline TA: Acta Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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University of Eastern Finland, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, Department of Clinical Radiology, Kuopio, Finland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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