Gemmill T J, Hammond G, Mellor D, Sullivan M, Bennett D, Carmichael S
Division of Companion Animal Sciences, Institute of Comparative Medicine, University of Glasgow, Bearsden Road, Glasgow G61 1QH T.
J Small Anim Pract. 2006 Feb;47(2):66-74. doi: 10.1111/j.1748-5827.2006.00052.x.
To assess the accuracy of reconstructed computed tomography for imaging canine elbow joint spaces.
Computed tomography scans of eight cadaveric elbows were obtained and reconstructed computed tomography images were formatted in the dorsal and sagittal planes. Humeroradial and humeroulnar joint space measurements were obtained from these images. Intra-observer and inter-observer variations in joint space measurements were assessed, as was the effect of specimen positioning (inter-image variation). After freezing, four elbows were sectioned in the dorsal plane and four in the sagittal plane. In addition to visual comparison of the frozen sections with reconstructed computed tomography images, joint space measurements were obtained from frozen sections and compared with those from reconstructed computed tomography images. Variation was assessed using statistical calculations and graphical techniques.
Both inter-image and intra-observer analyses revealed good agreement and low variation between data sets. Inter-observer correlation was only moderate, though variation was low. Visually, the reconstructed computed tomography images accurately reflected the frozen section anatomy. Agreement between frozen section and reconstructed computed tomography joint space measurements was good, with minimal variation.
These results indicate that reconstructed computed tomography is capable of accurately imaging elbow joint spaces and precise joint space measurements can be obtained. Reconstructed computed tomography may be useful for determining joint space measurements and detecting elbow incongruencies in dogs with elbow dysplasia.
评估重建计算机断层扫描对犬肘关节间隙成像的准确性。
获取八具尸体肘部的计算机断层扫描图像，并将重建的计算机断层扫描图像整理成背侧和矢状面图像。从这些图像中测量肱桡关节和肱尺关节间隙。评估观察者内和观察者间关节间隙测量的差异，以及标本定位的影响（图像间差异）。冷冻后，四个肘部在背侧平面切开，四个在矢状面切开。除了将冷冻切片与重建的计算机断层扫描图像进行视觉比较外，还从冷冻切片中获取关节间隙测量值，并与重建的计算机断层扫描图像中的测量值进行比较。使用统计计算和图形技术评估差异。
图像间分析和观察者内分析均显示数据集之间具有良好的一致性和低变异性。观察者间的相关性仅为中等，不过变异性较低。在视觉上，重建的计算机断层扫描图像准确地反映了冷冻切片的解剖结构。冷冻切片与重建的计算机断层扫描关节间隙测量值之间的一致性良好，变异性最小。
这些结果表明，重建计算机断层扫描能够准确地对肘关节间隙进行成像，并可获得精确的关节间隙测量值。重建计算机断层扫描可能有助于确定关节间隙测量值，并检测患有肘关节发育异常的犬的肘关节不协调情况。
