Feasibility study on liver CT contrast-enhanced scan with low dose of radiation and contrast agent

Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences
Fan LiuXiangjun Han

Abstract

To explore the feasibility for liver contrast-enhanced CT scan with low dose of radiation and contrast agent in clinical. A total of 180 cases were randomly divided into group I (low concentration of contrast agent, 270 mgI/mL of iodixanol) and group II (high concentration of contrast agent, 320 mgI/mL of iodixanol). Three scan conditions (A: 120 kV, 300 mA; B: 100 kV, 400 mA; and C: 100 kV, 300 mA) were randomly distributed in 3 phases (arterial phase, venous phase and delay phase) for liver scans in each group. The effective radiation dose (ED), image CT values and quality of images (image of noise (NI), the image signal to noise ratio (SNR), contrast to noise ratio (CNR), and overall image quality (OIQ) scores were recorded and analyzed. ED values for the group C in the total samples were decreased by 38%, 40% and 41%, respectively compared to the group A in contrast-enhanced scan for 3 phases. The image quality was significantly different (P<0.05); ED values in the group B were decreased by 18%, 20% and 20%, respectively compared to group A in contrast-enhanced scan for 3 phases, and there were no significant differences (P>0.05) in image quality. There were significant differences between the group I and the group II in CT...Continue Reading

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