The Effect of Different Contrast Media Flow Rate on the Enhanced CT Images of Patients with Hepatocellular Carcinoma
Objective To explore the effect of different contrast media flow rate on the enhanced CT images of patients with hepatocellular carcinoma.Methods 156 patients with liver cancer who were admitted to hospital from January 2019 to December 2022 were selected as the study subjects and divided into two groups according to the random number table method,78 patients in each group.All the patients underwent enhanced CT scan.The dose of iohexol injection was 100 ml,the contrast flow rate was 2.0～2.5 ml/s in the test group and 3.5～4.0 ml/s in the control group.The adverse reactions,imaging characteristics,radiation dose and image quality were recorded.Results The incidence of adverse reaction in the test group was lower than that in the control group(P<0.05).All the images of the patients could show 4～6 grade hepatic vascular branches.There was no significant difference in image quality between the two groups(P>0.05).The signal-to-noise ratio and contrast-to-noise ratio of images in the test group were lower than those in the control group(P<0.05).There was no significant difference between the two groups(P>0.05).There was no significant difference between the two groups in the detection rate of lesions in arterial phase,portal phase and equilibrium phase(P>0.05).Conclusion The decrease of flow rate in contrast medium does not affect the image quality and the detection rate of lesions,and does not increase the radiation dose,but it can decrease the incidence of adverse reactions,the SNR and the contrast noise ratio.
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