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Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome

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Abstract
Objective: To determine interobserver and intraobserver agreement for results of low-field magnetic resonance imaging (MRI) in dogs with and without disk-associated wobbler syndrome (DAWS). Design: Validation study. Animals: 21 dogs with and 23 dogs without clinical signs of DAWS. Procedures: For each dog, MRI of the cervical vertebral column was performed. The MRI studies were presented in a randomized sequence to 4 board-certified radiologists blinded to clinical status. Observers assessed degree of disk degeneration, disk-associated and dorsal compression, alterations in intraspinal signal intensity (PSI), vertebral body abnormalities, and new bone formation and categorized each study as originating from a clinically affected or clinically normal dog. Interobserver agreement was calculated for 44 initial measurements for each observer. Intraobserver agreement was calculated for 11 replicate measurements for each observer. Results: There was good interobserver agreement for ratings of disk degeneration and vertebral body abnormalities and moderate interobserver agreement for ratings of disk-associated compression, dorsal compression, alterations in ISI, new bone formation, and suspected clinical status. There was very good intraobserver agreement for ratings of disk degeneration, disk-associated compression, alterations in ISI, vertebral body abnormalities, and suspected clinical status. There was good intraobserver agreement for ratings of dorsal compression and new bone formation. Two of 21 clinically affected dogs were erroneously categorized as clinically normal, and 4 of 23 clinically normal dogs were erroneously categorized as clinically affected. Conclusions and Clinical Relevance: Results suggested that variability exists among observers with regard to results of MRI in dogs with DAWS and that MRI could lead to false-positive and false-negative assessments.
Keywords
SPONDYLOMYELOPATHY, MRI, FEATURES, STRENGTH, ARTIFACTS, OBSERVER AGREEMENT, DOBERMAN-PINSCHER, SPINAL-CORD COMPRESSION, MALFORMATION MALARTICULATION SYNDROME, CERVICAL VERTEBRAL INSTABILITY

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MLA
De Decker, Steven et al. “Intraobserver and Interobserver Agreement for Results of Low-field Magnetic Resonance Imaging in Dogs with and Without Clinical Signs of Disk-associated Wobbler Syndrome.” JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION 238.1 (2011): 74–80. Print.
APA
De Decker, Steven, Gielen, I., Duchateau, L., Lang, J., Dennis, R., Corzo-Menendez, N., van Bree, H., et al. (2011). Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 238(1), 74–80.
Chicago author-date
De Decker, Steven, Ingrid Gielen, Luc Duchateau, Johann Lang, Ruth Dennis, Nuria Corzo-Menendez, Henri van Bree, et al. 2011. “Intraobserver and Interobserver Agreement for Results of Low-field Magnetic Resonance Imaging in Dogs with and Without Clinical Signs of Disk-associated Wobbler Syndrome.” Javma-journal of the American Veterinary Medical Association 238 (1): 74–80.
Chicago author-date (all authors)
De Decker, Steven, Ingrid Gielen, Luc Duchateau, Johann Lang, Ruth Dennis, Nuria Corzo-Menendez, Henri van Bree, Iris Van Soens, Dominique Binst, Tim Waelbers, and Luc Van Ham. 2011. “Intraobserver and Interobserver Agreement for Results of Low-field Magnetic Resonance Imaging in Dogs with and Without Clinical Signs of Disk-associated Wobbler Syndrome.” Javma-journal of the American Veterinary Medical Association 238 (1): 74–80.
Vancouver
1.
De Decker S, Gielen I, Duchateau L, Lang J, Dennis R, Corzo-Menendez N, et al. Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION. 2011;238(1):74–80.
IEEE
[1]
S. De Decker et al., “Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome,” JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, vol. 238, no. 1, pp. 74–80, 2011.
@article{798866,
  abstract     = {Objective: To determine interobserver and intraobserver agreement for results of low-field magnetic resonance imaging (MRI) in dogs with and without disk-associated wobbler syndrome (DAWS).
Design: Validation study.
Animals: 21 dogs with and 23 dogs without clinical signs of DAWS.
Procedures: For each dog, MRI of the cervical vertebral column was performed. The MRI studies were presented in a randomized sequence to 4 board-certified radiologists blinded to clinical status. Observers assessed degree of disk degeneration, disk-associated and dorsal compression, alterations in intraspinal signal intensity (PSI), vertebral body abnormalities, and new bone formation and categorized each study as originating from a clinically affected or clinically normal dog. Interobserver agreement was calculated for 44 initial measurements for each observer. Intraobserver agreement was calculated for 11 replicate measurements for each observer.
Results: There was good interobserver agreement for ratings of disk degeneration and vertebral body abnormalities and moderate interobserver agreement for ratings of disk-associated compression, dorsal compression, alterations in ISI, new bone formation, and suspected clinical status. There was very good intraobserver agreement for ratings of disk degeneration, disk-associated compression, alterations in ISI, vertebral body abnormalities, and suspected clinical status. There was good intraobserver agreement for ratings of dorsal compression and new bone formation. Two of 21 clinically affected dogs were erroneously categorized as clinically normal, and 4 of 23 clinically normal dogs were erroneously categorized as clinically affected.
Conclusions and Clinical Relevance: Results suggested that variability exists among observers with regard to results of MRI in dogs with DAWS and that MRI could lead to false-positive and false-negative assessments.},
  author       = {De Decker, Steven and Gielen, Ingrid and Duchateau, Luc and Lang, Johann and Dennis, Ruth and Corzo-Menendez, Nuria and van Bree, Henri and Van Soens, Iris and Binst, Dominique and Waelbers, Tim and Van Ham, Luc},
  issn         = {0003-1488},
  journal      = {JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION},
  keywords     = {SPONDYLOMYELOPATHY,MRI,FEATURES,STRENGTH,ARTIFACTS,OBSERVER AGREEMENT,DOBERMAN-PINSCHER,SPINAL-CORD COMPRESSION,MALFORMATION MALARTICULATION SYNDROME,CERVICAL VERTEBRAL INSTABILITY},
  language     = {eng},
  number       = {1},
  pages        = {74--80},
  title        = {Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome},
  url          = {http://dx.doi.org/10.2460/javma.238.1.74},
  volume       = {238},
  year         = {2011},
}

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