Animal Medical Centre, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan.
Laboratory of Veterinary Clinical Oncology, Joint Department of Veterinary Medicine, Gifu University, Gifu, Japan.
Open Vet J. 2023 Feb;13(2):218-224. doi: 10.5455/OVJ.2023.v13.i2.10. Epub 2023 Feb 17.
Computed tomography (CT) is useful for evaluating the anatomical position of the adrenal gland and the presence of adrenal tumor (AT) metastasis or vascular invasion from ATs.
To determine a weight-independent reference for adrenal gland size in normal dogs using CT.
The medical records database of Gifu University was searched for data collected from April 2010 to December 2015 for records of dogs that underwent abdominal CT. The CT images were retrospectively analyzed using a Digital Imaging and Communications in Medicine viewer. The ratios of the minor axes of the adrenal glands to the height of the spinal cavity were investigated.
In total, 939 dogs were included. The left and right adrenal minor axes showed a moderate positive correlation with body weight (right: = 0.61, < 0.05; left: = 0.54, < 0.05). The L4 spinal cavity height showed a strong positive correlation with body weight ( = 0.82, < 0.05). The left and right adrenal minor axis/L4 spinal cavity ratio did not correlate with body weight (right: = 0.02, = 0.53; left: = -0.082, < 0.05). The 95% confidence intervals of the adrenal minor axis/L4 spinal cavity ratios were as follows: right: 0.5-1.3 and left: 0.5-1.4.
These results indicate that the adrenal minor axis/L4 spinal cavity ratio can be used as an index of adrenal gland size that is not affected by body weight. Patients in whom the adrenal minor axis/L4 spinal cavity ratio exceeds the upper limit (right 1.3, left 1.4) may have adrenal swelling.
计算机断层扫描（CT）可用于评估肾上腺的解剖位置以及肾上腺肿瘤（AT）转移或 AT 侵犯血管的情况。
使用 CT 确定正常犬的肾上腺大小的与体重无关的参考值。
检索岐阜大学的医学记录数据库，以获取 2010 年 4 月至 2015 年 12 月期间接受腹部 CT 检查的犬的数据记录。使用数字成像和通信医学（Digital Imaging and Communications in Medicine，DICOM）查看器对 CT 图像进行回顾性分析。研究了肾上腺的短轴与椎管高度的比值。
共纳入 939 只犬。左右肾上腺的短轴与体重呈中度正相关（右： = 0.61， < 0.05；左： = 0.54， < 0.05）。L4 椎管高度与体重呈强正相关（ = 0.82， < 0.05）。左右肾上腺短轴/L4 椎管比值与体重无关（右： = 0.02， = 0.53；左： = -0.082， < 0.05）。肾上腺短轴/L4 椎管比值的 95%置信区间如下：右：0.5-1.3 和左：0.5-1.4。
这些结果表明，肾上腺短轴/L4 椎管比值可作为不受体重影响的肾上腺大小的指标。肾上腺短轴/L4 椎管比值超过上限（右 1.3，左 1.4）的患者可能存在肾上腺肿胀。
