多层螺旋CT对比剂注射流率对肝硬化患者门静脉成像延迟时间的影响*

doi:10.3969/j.issn.1672-5069.2020.04.028

Abstract

Abstract: Objective The aim of this study was to investigate the impact of injected contrast velocities on portal vein imaging ofmultislice spiral computed tomography portography (MSCTP) in patients with liver cirrhosis (LC). Methods 168 patients with LC were admitted to our hospital between January 2017 and December 2019, and all of them were examined by MSCTP. When the contrast were injected, the patients were divided into three groups, with 56 in each, and in group A, the contrast was injected intravenously at velocityof 2 ml / s, in group B at 3 ml / s and in group C at 4 ml / s. Results The MSCTP was successfully performed in all patients, and the post-processing imaging showed that the smaller than grade 3 portal vain (PV) branches were clearly demonstrated, themain trunk, left and right branches of PV were significantly widened, the collateral circulation around the fundus of stomach was open, and the liver and spleen showed cirrhotic changes; the CT value of PV and thedifference of CT value of PV minus CT value of hepatic parenchyma in group A were (160.8±20.2) HU and (58.3±16.5) HU, significantly smaller than [(184.9±26.9) HU and (75.3±15.9) HU, respectively, P<0.05]in group C; the displayed PV branch in group A was 4.6±1.3, significantly lower than (5.7±0.9, P<0.05) in group C; the CT value of liver parenchyma in group A was not statistically significantly different compared with that in group C (P>0.05), while the PV delayed imaging time in group A was (44.5±1.2) s, significantly longer than that in group B [(42.2±0.8) s, P<0.05]and in group C [(34.5±0.7) s, P<0.05]; the PV delayed imaging time in group B was significantly longer than that in group C (P<0.05). Conclusion The injection velocity of contrast agent has a significant effect on MSCTP imaging quality and PV imaging delayed time in patients with liver cirrhosis. When the flow rate is 4 ml / s, theMSCTP image quality is the best and PV delayed imaging time is the shortest.

Key words: Liver cirrhosis, Multislice spiral computed tomography portolgraphy, Contrast agent, Flow velocity, Portal vein, Diagnosis

Wang Zhiliang, Hu Lei, Liu Xiaofeng. Impact of injected contrast velocities on portal vein imaging ofmultislice spiral computed tomography portography in patients with cirrhosis[J]. Journal of Practical Hepatology, 2020, 23(4): 564-567.

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Impact of injected contrast velocities on portal vein imaging ofmultislice spiral computed tomography portography in patients with cirrhosis

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