Harder Lisa K, Ludwig Davina C, Galindo-Zamora Vladimir, Nolte Ingo, Wefstaedt Patrick
Small Animal Hospital, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, D-30559, Hannover, Germany.
Small Animal Clinic, Faculty of Veterinary Medicine, National University of Colombia, Carrera 30 45-03 (Ciudad Universitaria), Bogotá, Colombia.
BMC Vet Res. 2015 May 14;11:110. doi: 10.1186/s12917-015-0421-x.
Displacement of canine intervertebral disk material can be seen directly in diagnostic imaging modalities such as magnetic resonance imaging and computed tomographic imaging. Canine intervertebral disk herniation can be differentiated into Hansen type 1 and 2 categories by clinical appearance, but anular- and nuclear disk material cannot be distinguished in computed tomographic images. Therefore, we hypothesized that the "Disk extension beyond the interspace"-nomenclature that describes the displacement by the disk contour might aid diagnosis. The aim of this study was to test the reliability of the "Disk extension beyond the interspace"-nomenclature in the evaluation of canine intervertebral disks via magnetic resonance and computed tomographic imaging.
Magnetic resonance and computed tomographic images of 144 intervertebral disks of 43 dogs were evaluated by 3 observers with different degrees of experience from 2 institutions retrospectively. A substantial intraobserver agreement was found, while interobserver agreement was fair to moderate with significant differences in evaluation. Comparison of imaging methods showed a fair to moderate agreement without statistically significant differences in evaluation.
DEBIT-nomenclature cannot be recommended for veterinary clinical usage yet. The largest variability was found in the evaluation of the bulged canine intervertebral disk. The observers' experience and the imaging method influenced DEBIT- evaluation only slightly, while training and working at different institutions influenced DEBIT-evaluation strongly.
在诸如磁共振成像和计算机断层成像等诊断成像方式中，可以直接看到犬椎间盘物质的移位。犬椎间盘突出症可根据临床表现分为汉森1型和2型，但在计算机断层图像中无法区分椎间盘的纤维环和髓核物质。因此，我们假设描述椎间盘轮廓移位的“椎间盘超出椎间隙延伸”这一术语可能有助于诊断。本研究的目的是通过磁共振成像和计算机断层成像来测试“椎间盘超出椎间隙延伸”这一术语在评估犬椎间盘时的可靠性。
来自两个机构的3名具有不同经验程度的观察者对43只犬的144个椎间盘的磁共振和计算机断层图像进行了回顾性评估。观察者内一致性较高，而观察者间一致性为中等，评估存在显著差异。成像方法的比较显示一致性为中等，评估无统计学显著差异。
目前不建议将“椎间盘超出椎间隙延伸”术语用于兽医临床。在评估膨出的犬椎间盘时发现变异性最大。观察者的经验和成像方法对“椎间盘超出椎间隙延伸”评估的影响较小，而在不同机构培训和工作对“椎间盘超出椎间隙延伸”评估有强烈影响。
