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Effects of image plane, patient positioning, and foraminal zone on magnetic resonance imaging measurements of canine lumbosacral intervertebral foramina

Zindl, C, Tucker, RL, Jovanovik, J, Gomez Alvarez, CB, Price, D and Fitzpatrick, Noel (2016) Effects of image plane, patient positioning, and foraminal zone on magnetic resonance imaging measurements of canine lumbosacral intervertebral foramina Veterinary Radiology & Ultrasound, 58 (2). pp. 206-215.

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Abstract

Degenerative lumbosacral stenosis has been suspected to have a dynamic component, especially regarding encroachment of the L7 nerve roots exiting the lumbosacral foramina. Angled cross-sectional imaging of the neuroforamina has been found improve the accuracy of the diagnosis of stenosis in humans. In this anatomic study, foraminal apertures were evaluated by MRI at the entry, middle, and exit zones of the nerve roots in 30 dogs that were clinically affected by lumbosacral disease. Standard vs. oblique planar orientation and neutral vs. hyperextended positioning of the lumbosacral area were compared by measuring the median values for entry, middle, and exit zones. The neuroforaminal area acquired using oblique plane acquisition was significantly smaller than standard parasagittal measurements. Furthermore, standard parasagittal neuroforaminal dimensions in the hyperextended position were significantly smaller than standard parasagittal measurements in the neutral position. This statistical difference was even more pronounced for neuroforaminal dimension evaluated in the oblique plane and hyperextended position. Positioning of the dog during imaging has a significant effect on neuroforaminal dimension, corroborating the notion that spinal position may influence neural claudication in clinically affected patients. Reductions in neuroforaminal dimension are more evident on oblique planar image acquisition, suggesting that this approach may be more useful than parasagittal imaging as a tool for identifying subtle changes in L7 neuroforaminal dimensions in cases of canine lumbosacral stenosis.

Item Type: Article
Subjects : Veterinary Medicine
Divisions : Faculty of Health and Medical Sciences > School of Veterinary Medicine
Authors :
NameEmailORCID
Zindl, CUNSPECIFIEDUNSPECIFIED
Tucker, RLUNSPECIFIEDUNSPECIFIED
Jovanovik, JUNSPECIFIEDUNSPECIFIED
Gomez Alvarez, CBUNSPECIFIEDUNSPECIFIED
Price, DUNSPECIFIEDUNSPECIFIED
Fitzpatrick, Noelnoel.fitzpatrick@surrey.ac.ukUNSPECIFIED
Date : 16 November 2016
Identification Number : 10.1111/vru.12438
Copyright Disclaimer : Copyright 2016 Wiley Publications
Uncontrolled Keywords : dogs, hyperextended position, lumbosacral foraminal stenosis, MRI, sagittal oblique plane.
Related URLs :
Additional Information : Previous presentations or abstracts: Portions of this study were presented at the BSAVA Congress, April 4—7, 2013, Birmingham, UK; and at the WVOC Meeting, March 1–8, 2014, Breckenridge, Colorado, USA.
Depositing User : Symplectic Elements
Date Deposited : 22 Feb 2017 16:06
Last Modified : 14 Jun 2017 10:36
URI: http://epubs.surrey.ac.uk/id/eprint/813607

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