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

Show simple item record Rosenblatt, Alana J Lappalainen, Anu K James, Nina A Webster, Natalie S L Caraguel, Charles G B 2018-10-14T03:22:59Z 2018-10-14T03:22:59Z 2018-10-13
dc.identifier.citation Acta Veterinaria Scandinavica. 2018 Oct 13;60(1):62
dc.description.abstract Abstract Background The 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. Results Twenty-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). Conclusions Despite 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.
dc.publisher BioMed Central
dc.subject CT
dc.subject Dachshund
dc.subject Intervertebral disc calcification
dc.subject MRI
dc.subject Radiography
dc.subject Repeatability
dc.subject Reproducibility
dc.subject Scoring
dc.title Scorer and modality agreement for the detection of intervertebral disc calcification in Dachshunds 2018-10-14T03:23:00Z
dc.language.rfc3066 en
dc.rights.holder The Author(s)

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