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Title: Lumbosacral spinal compression device with the use of a cushion back support in supine MRI
Authors: Witaya Sungkarat
Jiraporn Laothamatas
Ladawan Worapruekjaru
Boonthida Hooncharoen
Jarruwat Charoensuk
Khaisang Chousangsuntorn
King Mongkut's Institute of Technology Ladkrabang
Faculty of Medicine, Ramathibodi Hospital, Mahidol University
Mahidol University
HRH Princess Chulabhorn College of Medical Science
Keywords: Health Professions;Medicine
Issue Date: 1-Jan-2020
Citation: Acta Radiologica. (2020)
Abstract: © The Foundation Acta Radiologica 2020. Background: We hypothesized that axial-loaded magnetic resonance imaging (MRI), modified with the use of a cushion placed behind the lower back (i.e. BS-MRI method), would simulate the standing position more accurately than an axial-loaded MRI without a cushion back support (BS). Purpose: To determine whether the BS-MRI method demonstrated similar morphologies on intervertebral disc (IVD), dural sac, and spinal curvature as those detected on 90° standing MRIs in individuals with suspected spinal stenosis. Material and Methods: Twenty-five subjects underwent a BS-MRI, as well as axial-loaded and standing MRI studies. Outcome measures were four radiographic parameters of the lumbar spine: IVD height (DH); dural sac cross-sectional area (DCSA); and spinal curvature (i.e. lumbar lordosis [LL] and L1-L3-L5 angle [LA]). Results: Major differences (>5%) between standing MRI and BS-MRI methods were observed in DCSA, DH, and LL. Major differences between standing and axial loaded MRIs were observed only in DCSA and LA. Although BS-MRIs demonstrate an image of the lumbar spine curvature (i.e. LA) which is closer to that when standing than axial-loaded MRIs, it is likely to overestimate both narrowing of dural sac and extent of LL. Conclusion: Using a compression device with a BS to simulate weight-bearing on the lumbar spine is not recommended due to: (i) overestimation of the narrowing of the dural sac and extent of LL; and (ii) underestimation of loss of disc height. Supine axial-loading produced DCSA and DH which were strongly correlated with those detected with standing MRIs. Exceptions were that LL and LA were underestimated.
ISSN: 16000455
Appears in Collections:Scopus 2020

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