目的:非心电和心电门控多探测器计算机断层扫描的特征尚未在兽医诊所得到广泛研究,但可用于心脏成像。本研究旨在确定非心电图和心电图门控方法之间的差异,并根据患者病史确定其临床实用性。
方法:六只客户拥有的狗(两只动脉导管未闭,两个心脏基底肿瘤,一个有心包间皮瘤,和一个健康正常的人)被包括在这项研究中。所有的狗都使用非心电图门控扫描进行检查,随后进行回顾性心电图门控扫描。检查图像以确定非心电图和心电图门控图像中的最佳扫描时机和R-R间期。分别,详细的冠状动脉成像,通过对主要冠状动脉分支的视觉评估,在非心电图和心电图门控图像中最佳冠状动脉可视化的诊断质量,和左冠状动脉的分支模式。Further,我们比较了心脏或心包肿瘤患者的非心电图和心电图门控图像中心脏或心包病变的大小和边缘分界.
结果:最佳扫描定时和R-R间隔是第二次扫描定时和舒张末期(70%-90%),分别。第二次扫描非心电图门控图像允许冠状动脉评估,在视觉评估中表明高质量,除了中隔分支.心电图门控图像,但不是非ECG门控图像,清楚地显示了两只狗的心包结节。
结论:我们的研究结果表明,根据患者病史,使用高切片心脏计算机断层扫描进行非心电图或心电图门控成像的临床应用。
The characteristics of non-electrocardiography- and electrocardiography-gated multidetector computed tomography have not been extensively studied in veterinary clinics but it can be useful for cardiac imaging. This study aimed to ascertain the differences between non-electrocardiography and electrocardiography gating methods and to establish their clinical utility based on patient history.
Six client-owned dogs (two with patent ductus arteriosus, two with heart base tumour, one with pericardial mesothelioma, and one with normal health) were included in this study. All the dogs were examined using a non-electrocardiography-gated scan, followed by a retrospective electrocardiography-gated scan. Images were reviewed to determine the optimal scan timing and R-R interval in non-electrocardiography- and electrocardiography-gated images, respectively, for detailed coronary artery imaging, diagnostic quality of the best coronary artery visualisation in non-electrocardiography- and electrocardiography-gated images through visual assessment of the main coronary artery branches, and branching patterns of the left coronary artery. Further, we compared the size and margin demarcation of the heart or pericardial lesions in non-electrocardiography- and electrocardiography-gated images obtained from patients with heart or pericardial tumours.
The optimal scan timing and R-R interval were the second-scan timing and end-diastole (70%-90%), respectively. Second-scan non-electrocardiography-gated images allowed coronary artery evaluation, indicating high-grade quality in visual assessment, except for the septal branch. Electrocardiography-gated images, but not non-ECG-gated images, clearly revealed pericardial nodules in two dogs.
Our findings suggest the respective clinical utilities of non-electrocardiography- or electrocardiography-gated imaging using high-slice cardiac computed tomography based on patient history.