The study of correlation between dose of contrast material and enhancement effect in CT scan

Objective: To compare the enhancement effect of CT scan in patients' upper abdomen using diffferent dosage of contrast medium,fair use the dosage of contrast medium improves the enhancement effiiciency.Methods: 81 routine CT enhancement scanning's were divided into 3 groups according to the dose of the contrast agent,0.9 mL/kg(groupA n=27),1.1 mL/kg(group B n=25) and 1.3 mL/kg(group C n=29) respectively.The enhancement peak values of abdomial aorta and portal vein were measured,makes the still according to the demonstrated situation of the hepatic artery and disciple vein after workstation reconstruction and compare among groups.Results: The enhancement peak values of abdominal aorta between group A and group C were different significantly.The values of portal vein were significant difference among three groups.Grading condition of hepatic artery showed on significant difference among three groups's imaging.Grading condition of portal vein had significant difference between group A and group C,group B and group C but no difference between group A and group B.Conslusion: Three kinds of dosage(0.9,1.1 and 1.3 mL/kg) have the same enhancement effects in the hepatic arterial phase,the more of the dosage of contrast medium,the better of the efficiency display in the imaging of portal vein.