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Variation of canine vertebral bone architecture in computed tomography
Byunggyu CHEON, Seungjo PARK, Sang-kwon LEE, Jun-Gyu PARK, Kyoung-Oh CHO, Jihye CHOI*
College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
Correspondence to: Tel: +82-62-530-2821; E-mail: imsono@chonnam.ac.kr
Received: February 3, 2017; Revised: May 13, 2017; Accepted: June 21, 2017; Published online: July 10, 2017.
Focal vertebral bone density changes were assessed in vertebral CT images from the clinically healthy dogs, without diseases that affect bone density. The number, location, and density of the lesion were determined. A total of 429 vertebral CT images from 20 dogs were reviewed, and 99 focal vertebral changes were identified in 14 dogs. Focal vertebral bone density changes were mainly found in thoracic vertebra (29.5%) as hyperattenuating (86.9%) lesions. All focal vertebral changes were observed at the vertebral body, except for a single hyperattenuating change in one thoracic transverse process. Among the hyperattenuating changes, multifocal changes (53.5%) were more common than single changes (46.5%). Most of the hypoattenuating changes were single (92.3%). Eight of all 20 dogs (40%), in which 61.6% of 13 dogs showing focal vertebral changes in the thoracic vertebra, had hyperattenuating changes at the 7th or 8th thoracic vertebra. Our findings indicated that focal changes in vertebral bone density are commonly identified on vertebral CT images in healthy dogs and these should be taken into consideration on interpretation of CT images.
Keywords: bone density, canine, computed tomography, vertebra

© 2017 The Korean Society of Veterinary Science.