J Korean Orthop Assoc.  2016 Dec;51(6):473-478. 10.4055/jkoa.2016.51.6.473.

Change in Neural Tube Size for a Lumbar Spinal Stenosis Patient on Axial Loading Magnetic Resonance Imaging

Affiliations
  • 1Department of Orthopaedic Surgery, Wonkwang University Sanbon Hospital, Gunpo, Korea.
  • 2Department of Orthopaedic Surgery, Wonkwang University School of Medicine, Iksan, Korea. osktg@wonkwang.ac.kr

Abstract

PURPOSE
A conventional magnetic resonance imaging (MRI) was conducted in supine position, showing a slight different from that conducted in upright position. Therefore, we simulated the upright position by applying the axial load on a lumbar spinal stenosis patient and measured the change of neural tube size in axial load and standardized the data.
MATERIALS AND METHODS
We compared the axial loading MRI obtained from spinal stenosis patients who visited Wonkwang University Hospital outpatient clinic between October 2010 and May 2011 showing radiologic and physical symptoms.
RESULTS
Neural tube sizes by conventional MRI were as follows: 195.57 mm² and 203.20 mm² on average between the left and right sides in L3/4; 194.64 mm² and 211.43 mm² on average in L4/5; and 199.38 mm² and 203.04 mm² on average in L5/S1. Neural tube sizes by axial loading MRI were as follows: 166.43 mm² and 174.27 mm² on average between the left and right sides in L3/4; 154.81 mm² and 158.67 mm² on average in L4/5; and 148.48 mm² and 157.19 mm² on average in L5/S1. Changes of neural tube sizes in L3/4, L4/5, and L5/S1 had a significant correlation (p<0.05).
CONCLUSION
The axial loading device was an excellent tool in simulating the upright position for spinal stenosis patients, and the change of neural tube sizes reproduced for the upright position was statistically significant. This is thought to be meaningful for clinical applicability.

Keyword

neural tube size; magnetic resonance imaging; spinal stenosis

MeSH Terms

Humans
Magnetic Resonance Imaging*
Neural Tube*
Outpatient Clinics, Hospital
Spinal Stenosis*
Supine Position
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