Financial support for this project was provided by the Student Summer Research Program, Center of Excellence, University of Tennessee College of Veterinary Medicine.
Magnetic Resonance Imaging (MRI) Spinal Cord and Canal Measurements in Normal Dogs
Article first published online: 15 MAR 2013
© 2013 The Authors. Anatomia, Histologia, Embryologia published by Blackwell Verlag GmbH.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Anatomia, Histologia, Embryologia
Volume 43, Issue 1, pages 36–41, February 2014
How to Cite
Hecht, S., Huerta, M. M. and Reed, R. B. (2014), Magnetic Resonance Imaging (MRI) Spinal Cord and Canal Measurements in Normal Dogs. Anatomia, Histologia, Embryologia, 43: 36–41. doi: 10.1111/ahe.12045
- Issue published online: 9 JAN 2014
- Article first published online: 15 MAR 2013
- Manuscript Accepted: 28 JAN 2013
- Manuscript Received: 9 NOV 2012
- Student Summer Research Program
The goal of this study was to establish Magnetic resonance imaging (MRI) reference ranges for spinal measurements in normal dogs. Forty dogs (1–10 kg, 11–20 kg, 21–30 kg, > 30 kg; 10 dogs per category) underwent spinal MRI. Measurements were performed on sagittal T2-W images at the level of the 4th thoracic vertebra (T4), the 9th thoracic vertebra (T9) and the 3rd lumbar vertebra (L3). Spinal canal diameter (mm) ranged from 6.07 ± 0.63 (1–10 kg) to 8.27 ± 1.15 (> 30 kg) at the level of T4; 6.55 ± 0.61 (1–10 kg) to 9.04 ± 1.26 (> 30 kg) at the level of T9; and 6.80 (6.47–7.00; 1–10 kg) to 9.00 (7.90–9.73; > 30 kg) at the level of L3. There were significant differences (P < 0.05) in spinal canal diameter between groups. Mean spinal cord diameter (mm) ranged from 4.46 ± 0.51 (11–20 kg) to 4.70 ± 0.35 (1–10 kg) at the level of T4; 4.41 ± 0.50 (> 30 kg) to 4.85 ± 0.57 (1–10 kg) at the level of T9; and 4.52 ± 0.51 (> 30 kg) to 5.14 ± 0.68 (1–10 kg) at the level of L3. There were no significant differences in spinal cord diameter between groups. Spinal cord-to-spinal canal ratio varied significantly, ranging from 0.51 ± 0.08 (> 30 kg at L3) to 0.78 (0.69–0.80; 1–10 kg at T4) (P < 0.05). These findings are important when using MRI to evaluate patients with suspected diffuse spinal cord disease.