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J Vet Sci 2018; 19(2): 296-300  https://doi.org/10.4142/jvs.2018.19.2.296
Novel vertebral computed tomography indices in normal and spinal disorder dogs
Jongsu Lim, Youngmin Yoon, Taesung Hwang, Hee Chun Lee*
Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju 30488, Korea
Correspondence to: Tel: +82-55-772-2356; Fax: +82-55-772-2330; E-mail: lhc@gnu.ac.kr
Received: August 22, 2017; Revised: November 7, 2017; Accepted: November 16, 2017; Published online: March 31, 2018.
Abstract
This study was carried out to derive and evaluate reference computed tomography (CT)-based indices for normal canine spine. CT and magnetic resonance images were acquired from 12 clinically normal Beagle dogs (normal group) and 50 dogs with 56 spinal disorders (patient group). Image acquisition regions were cervical spine (C2-T1), thoracic spine (T1-T13), and lumbar spine (L1-L7). Measured indices were: the ratios of width to height of the spinal cord including the dura matter (CR) and of the vertebral foramen (FR), and the ratio of the cross-sectional area of the spinal cord to that of the vertebral foramen (CFAR). Reliability analysis was performed to evaluate intermodality agreement. Student’s t-tests and receiver operating characteristic curves were used to discriminate the normal and patient groups on CT. Intermodality agreements of the normal and patient groups were acceptable to excellent. The highest discriminating levels of CR at the vertebral body level and the intervertebral disc space level were 1.25 or more and 1.44 or more, respectively. FR and CFAR had the highest discriminating level at the cervical region. This report presents quantitative information on canine spinal morphometry; the obtained indices may be helpful for CT screening of dogs with spinal disorders.
Keywords: computed tomography, dogs, magnetic resonance imaging, vertebral disease


© 2018 The Korean Society of Veterinary Science.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.