Department of Veterinary Clinical Sciences, The Ohio State University Veterinary Medical Center, Columbus, Ohio, USA.
Department of Veterinary Preventative Medicine, The Ohio State University Veterinary Medical Center, Columbus, Ohio, USA.
Vet Radiol Ultrasound. 2021 Sep;62(5):519-524. doi: 10.1111/vru.12976. Epub 2021 Jun 20.
The vertebral heart scale (VHS) has long been used as an objective standard for evaluation of cardiac silhouette size on thoracic radiographs and plays a key role in the diagnosis as well as the assessment of the severity of canine heart disease. Based on our review of the literature, there has been no published study describing an objective method for measuring overall heart size using computed tomography (CT) in canine patients. The goals of this exploratory prospective method comparison study were to describe a method for objectively evaluating heart size on canine thoracic CT images, determine whether there was a correlation between the VHS when applied to a right lateral thoracic radiograph and a sagittal image of a thoracic CT scan, and determine the effect of cardiac phase on a VHS measured on CT. A method for measuring VHS on canine CT studies was defined. Data were collected on canine patients admitted to The Ohio State Veterinary Medical Center. Each patient received an ECG-gated thoracic CT immediately followed by a right lateral thoracic radiograph. The VHS was measured on non-gated, systolic, and diastolic sagittal CT reformatted images. Our results indicated that cardiac gating may not be necessary when assessing canine heart size on CT. When comparing the VHS on gated and non-gated CT to the VHS on radiographs, there was a moderate to high degree of correlation; however, there was a high degree of variability between CT and radiography.
椎体心脏比例（VHS）长期以来一直被用作评估胸部 X 光片中心脏轮廓大小的客观标准，在心犬心脏病的诊断和严重程度评估中起着关键作用。根据我们对文献的回顾，目前还没有发表的研究描述使用计算机断层扫描（CT）在犬患者中测量整体心脏大小的客观方法。本探索性前瞻性方法比较研究的目的是描述一种客观评估犬胸部 CT 图像中心脏大小的方法，确定应用于右侧侧位胸部 X 光片和胸部 CT 扫描矢状图像的 VHS 之间是否存在相关性，以及确定心脏相位对 CT 测量 VHS 的影响。定义了一种用于测量犬 CT 研究中 VHS 的方法。收集了在俄亥俄州立兽医医疗中心就诊的犬患者的数据。每位患者均接受 ECG 门控胸部 CT 检查，随后立即进行右侧侧位胸部 X 光检查。在非门控、收缩期和舒张期矢状 CT 重建图像上测量 VHS。我们的结果表明，在 CT 上评估犬心脏大小时可能不需要心脏门控。当将门控和非门控 CT 上的 VHS 与 X 光片上的 VHS 进行比较时，相关性中等至高；然而，CT 和 X 光片之间存在高度可变性。
