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EVALUATION OF MAGNETIC RESONANCE IMAGING GUIDELINES FOR DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS AND INTERVERTEBRAL DISK PROTRUSIONS IN DOGS.
Vet Radiol Ultrasound. 2016 Sep; 57(5):526-33.VR

Abstract

Four MRI variables have recently been suggested to be independently associated with a diagnosis of thoracolumbar intervertebral disk extrusion or protrusion. Midline intervertebral disk herniation, and partial intervertebral disk degeneration were associated with intervertebral disk protrusion, while presence of a single intervertebral disk herniation and disk material dispersed beyond the boundaries of the intervertebral disk space were associated with intervertebral disk extrusion. The aim of this retrospective, cross-sectional study was to determine whether using these MRI variables improves differentiation between thoracolumbar intervertebral disk extrusions and protrusions. Eighty large breed dogs with surgically confirmed thoracolumbar intervertebral disk extrusions or protrusions were included. Randomized MRI studies were presented on two occasions to six blinded observers, which were divided into three experience categories. During the first assessment, observers made a presumptive diagnosis of thoracolumbar intervertebral disk extrusion or protrusion without guidelines. During the second assessment they were asked to make a presumptive diagnosis with the aid of guidelines. Agreement was evaluated by Kappa-statistics. Diagnostic accuracy significantly improved from 70.8 to 79.6% and interobserver agreement for making a diagnosis of intervertebral disk extrusion or intervertebral disk protrusion improved from fair (κ = 0.27) to moderate (κ = 0.41) after using the proposed guidelines. Diagnostic accuracy was significantly influenced by degree of observer experience. Intraobserver agreement for the assessed variables ranged from fair to excellent and interobserver agreement ranged from fair to moderate. The results of this study suggest that the proposed imaging guidelines can aid in differentiating thoracolumbar intervertebral disk extrusions from protrusions.

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Authors+Show Affiliations

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England. sdedecker@rvc.ac.uk.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

Department of Veterinary Clinical Science and Services, Royal Veterinary College, University of London, Hawkshead lane, AL9 7TA North Mymms, Hatfield, England.

MeSH

AnimalsCross-Sectional StudiesDog DiseasesDogsFemaleGuidelines as TopicIntervertebral Disc DegenerationIntervertebral Disc DisplacementMagnetic Resonance ImagingMaleRetrospective Studies

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27374979

Citation

De Decker, Steven, et al. "EVALUATION of MAGNETIC RESONANCE IMAGING GUIDELINES for DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS and INTERVERTEBRAL DISK PROTRUSIONS in DOGS." Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, vol. 57, no. 5, 2016, pp. 526-33.

De Decker S, Gomes SA, Packer RM, et al. EVALUATION OF MAGNETIC RESONANCE IMAGING GUIDELINES FOR DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS AND INTERVERTEBRAL DISK PROTRUSIONS IN DOGS. Vet Radiol Ultrasound. 2016;57(5):526-33.

De Decker, S., Gomes, S. A., Packer, R. M., Kenny, P. J., Beltran, E., Parzefall, B., Fenn, J., Nair, D., Nye, G., & Volk, H. A. (2016). EVALUATION OF MAGNETIC RESONANCE IMAGING GUIDELINES FOR DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS AND INTERVERTEBRAL DISK PROTRUSIONS IN DOGS. Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, 57(5), 526-33. https://doi.org/10.1111/vru.12394

De Decker S, et al. EVALUATION of MAGNETIC RESONANCE IMAGING GUIDELINES for DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS and INTERVERTEBRAL DISK PROTRUSIONS in DOGS. Vet Radiol Ultrasound. 2016;57(5):526-33. PubMed PMID: 27374979.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - EVALUATION OF MAGNETIC RESONANCE IMAGING GUIDELINES FOR DIFFERENTIATION BETWEEN THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS AND INTERVERTEBRAL DISK PROTRUSIONS IN DOGS. AU - De Decker,Steven, AU - Gomes,Sergio A, AU - Packer,Rowena Ma, AU - Kenny,Patrick J, AU - Beltran,Elsa, AU - Parzefall,Birgit, AU - Fenn,Joe, AU - Nair,Devi, AU - Nye,George, AU - Volk,Holger A, Y1 - 2016/07/04/ PY - 2016/02/05/received PY - 2016/04/04/revised PY - 2016/05/25/accepted PY - 2016/7/5/entrez PY - 2016/7/5/pubmed PY - 2017/5/31/medline KW - accuracy KW - agreement KW - intervertebral disk disease KW - intervertebral disk herniation KW - reliability SP - 526 EP - 33 JF - Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association JO - Vet Radiol Ultrasound VL - 57 IS - 5 N2 - Four MRI variables have recently been suggested to be independently associated with a diagnosis of thoracolumbar intervertebral disk extrusion or protrusion. Midline intervertebral disk herniation, and partial intervertebral disk degeneration were associated with intervertebral disk protrusion, while presence of a single intervertebral disk herniation and disk material dispersed beyond the boundaries of the intervertebral disk space were associated with intervertebral disk extrusion. The aim of this retrospective, cross-sectional study was to determine whether using these MRI variables improves differentiation between thoracolumbar intervertebral disk extrusions and protrusions. Eighty large breed dogs with surgically confirmed thoracolumbar intervertebral disk extrusions or protrusions were included. Randomized MRI studies were presented on two occasions to six blinded observers, which were divided into three experience categories. During the first assessment, observers made a presumptive diagnosis of thoracolumbar intervertebral disk extrusion or protrusion without guidelines. During the second assessment they were asked to make a presumptive diagnosis with the aid of guidelines. Agreement was evaluated by Kappa-statistics. Diagnostic accuracy significantly improved from 70.8 to 79.6% and interobserver agreement for making a diagnosis of intervertebral disk extrusion or intervertebral disk protrusion improved from fair (κ = 0.27) to moderate (κ = 0.41) after using the proposed guidelines. Diagnostic accuracy was significantly influenced by degree of observer experience. Intraobserver agreement for the assessed variables ranged from fair to excellent and interobserver agreement ranged from fair to moderate. The results of this study suggest that the proposed imaging guidelines can aid in differentiating thoracolumbar intervertebral disk extrusions from protrusions. SN - 1740-8261 UR - https://www.unboundmedicine.com/medline/citation/27374979/EVALUATION_OF_MAGNETIC_RESONANCE_IMAGING_GUIDELINES_FOR_DIFFERENTIATION_BETWEEN_THORACOLUMBAR_INTERVERTEBRAL_DISK_EXTRUSIONS_AND_INTERVERTEBRAL_DISK_PROTRUSIONS_IN_DOGS_ L2 - https://doi.org/10.1111/vru.12394 DB - PRIME DP - Unbound Medicine ER -