College of Veterinary Medicine, Kyungpook National University, Daegu, South Korea.
College of Veterinary Medicine, Kangwon National University, Chuncheon, South Korea.
Open Vet J. 2023 Jul;13(7):819-825. doi: 10.5455/OVJ.2023.v13.i7.2. Epub 2023 Jul 31.
Various salivary gland diseases diagnosed on computed tomography (CT) in dogs have been reported. However, no study described the size and CT attenuation value of normal salivary glands in dogs.
This retrospective analytical study aimed to evaluate the size and attenuation value of the mandibular and zygomatic salivary glands on CT in dogs without cervical or head lesions.
The maximum cross-sectional area (MCSA) was measured in 96 dogs and attenuation value on non-contrast and postcontrast images were measured in 90 dogs. Dogs were divided into three groups based on body weight: group 1, ≤ 5.0 kg; group 2, 5.1-10.0 kg; and group 3, 10.1-15.0 kg.
There were significant differences in MCSA for both glands among the three groups. There was no difference in MCSA between the left and right sides in both salivary glands. The MCSA for both salivary glands positively correlated with body weight ( < 0.001). There was a significant difference in the MCSA of the zygomatic gland between males and females ( = 0.02), but there was no significant difference in the mandibular gland. There was a significant difference in the attenuation value between the mandibular and zygomatic glands in non-contrast studies ( < 0.001), but there was no significant difference in postcontrast studies.
This study established the reference for the size and attenuation value of the mandibular and zygomatic glands in dogs and provided background data for future CT evaluation of dogs with salivary gland diseases.
在犬只的计算机断层扫描（CT）检查中已经报道了各种唾液腺疾病。然而，尚无研究描述犬正常唾液腺的大小和 CT 衰减值。
本回顾性分析性研究旨在评估无颈部或头部病变的犬下颌和颧骨唾液腺在 CT 上的大小和衰减值。
在 96 只犬中测量了最大横截面积（MCSA），在 90 只犬中测量了非对比和对比后图像的衰减值。根据体重将犬分为三组：第 1 组，≤ 5.0 kg；第 2 组，5.1-10.0 kg；第 3 组，10.1-15.0 kg。
三组犬的两种腺体的 MCSA 均存在显著差异。两种腺体的左右侧 MCSA 无差异。两种唾液腺的 MCSA 与体重呈正相关（<0.001）。雄性和雌性犬的颧骨唾液腺 MCSA 存在显著差异（=0.02），但下颌唾液腺无显著差异。非对比研究中下颌和颧骨的衰减值存在显著差异（<0.001），但对比后研究无显著差异。
本研究建立了犬下颌和颧骨唾液腺大小和衰减值的参考值，为未来犬唾液腺疾病的 CT 评估提供了背景数据。
