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Optimal delay for triple-phase hepatic computed tomography using a bolustracking technique in cats

Animal Diseases 2022年第2期2卷 100-108页

作者： Bin Li Mingli Ren Mahmoud M.Abouelfetouh Panpan Guo Ming Xing Ding Diqi Yang Yanqing Wu Yi Ding College of Veterinary Medicine Huazhong Agricultural UniversityWuhanHubei Province 430070P.R.China College of Veterinary Medicine Benha UniversityMoshtohorEgypt

The objective of this study was to provide the characteristics of hepatic computed tomography images and optimize their transition delay with a bolus-tracking technique for triple-phase hepatic computed tomography in cats.Dynamic triple-phase computed tomography was performed in nine healthy cats.The upper third of the liver was dynamically scanned every 0.5 s for 40 s.The time density curves of the aorta and hepatic parenchyma mean enhancement were analyzed.Triple-phase hepatic computed tomography was performed three times with a bolus trigger of 200 Hounsfield units of aortic enhancement.The transition delays of the arterial,portal,and hepatic parenchymal phases were respectively 0,5 and 60 s in the first scan;2,7 and 62 s in the second scan;and 4,9 and 64 s in the third scan.All computed tomography images were evaluated by a certificated radiologist.The arterial vessels and their main branches were well enhanced at a 2 s transition delay.The contrast of the portal vein to the liver parenchyma was most obvious at a 7 s transition delay.The mean enhancement of the hepatic parenchyma peaked at a 62 s transition delay,whereas the degree of enhancement of the hepatic vasculature decreased.In this study,the recommended transition delays for the arterial,portal,and hepatic parenchymal phases were 2 s,7 s and 62 s,respectively,after triggering at 200 Hounsfield units of aortic enhancement.This information may be helpful in diagnosing feline liver diseases and provides a key reference for the clinical implementation of CT.

关键词： bolus-tracking CT Feline Liver Triple-phase

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