Scorer and modality agreement for the detection of intervertebral disc calcification in Dachshunds

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http://hdl.handle.net/10138/260555

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Rosenblatt , A J , Lappalainen , A K , James , N A , Webster , N S L & Caraguel , C G B 2018 , ' Scorer and modality agreement for the detection of intervertebral disc calcification in Dachshunds ' , Acta Veterinaria Scandinavica , vol. 60 , 62 . https://doi.org/10.1186/s13028-018-0416-2

Title: Scorer and modality agreement for the detection of intervertebral disc calcification in Dachshunds
Author: Rosenblatt, Alana Jayne; Lappalainen, Anu Katriina; James, Nina Alice; Webster, Natalie Siu Ling; Caraguel, Charles Gregoire Benedict
Contributor: University of Helsinki, Faculty of Veterinary Medicine
Date: 2018-10-13
Language: eng
Number of pages: 11
Belongs to series: Acta Veterinaria Scandinavica
ISSN: 0044-605X
URI: http://hdl.handle.net/10138/260555
Abstract: BackgroundThe Dachshund is a chondrodystrophic breed of dog predisposed to premature degeneration and calcification, and subsequent herniation, of intervertebral discs (IVDs). This condition is heritable in Dachshunds and breeding candidates are screened for radiographically detectable intervertebral disc calcification (RDIDC), a feature of advanced disc degeneration and a prognostic factor for clinical disease. RDIDC scoring has been previously shown to be consistent within scorers; however, strong scorer effect (subjectivity) was also reported. The aim of this study was to estimate the within- and between-scorer agreement (repeatability and reproducibility, respectively) of computed tomography (CT) scanning and magnetic resonance imaging (MRI) for scoring IVD calcification, and to compare these modalities with radiographic scoring.ResultsTwenty-one Dachshund dogs were screened for IVD calcification using the three imaging modalities. Three scorers scored each case twice, independently. Repeatability was highest for radiography (95.4%), and significantly higher than for CT (90.4%) but not MRI (93.8%). Reproducibility was also highest for radiography (92.9%), but not significantly higher than for CT or MRI (89.4% and 86.4%, respectively). Overall, CT scored IVDs differently than radiography and MRI (64.8% and 62.7% agreement, respectively), while radiography and MRI scored more similarly (85.7% agreement).ConclusionsDespite high precision for radiography, previous evidence of scorer subjectivity was confirmed, which was not generally observed with CT and MRI. The increased consistency of radiography may be related to prior scorer experience with the modality and RDIDC scoring. This study does not support replacing radiography with CT or MRI to screen for heritable IVD calcification in breeding Dachshunds; however, evaluation of dog-level precision and the accuracy of each modality is recommended.
Subject: CT
Dachshund
Intervertebral disc calcification
MRI
Radiography
Repeatability
Reproducibility
Scoring
MAGNETIC-RESONANCE
COMPUTED-TOMOGRAPHY
NONCHONDRODYSTROPHIC DOGS
DEGENERATION
DISEASE
HERNIATION
SPINE
HEMILAMINECTOMY
CLASSIFICATION
HERITABILITY
413 Veterinary science
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