A comparative study of CT enhanced effect in abdominal vessels with different iodine concentrations of contrast agent / 实用放射学杂志

ABSTRACT

Objective To investigate CT enhanced effect in abdominal vessels with three different iodine concentration with the fixed iodine delivery rate and total iodine load.Methods 90 patients were randomized into 270 (270 mg I/mL),320 (320 mg I/mL) and 370 (370 mg I/mL)groups.On arterial phase images,the CT values of abdominal aorta (AA)were measured at the level of the porta hepatis,the right renal artery and the bifurcation of iliac artery.On portal veins phase images,the CT values of the main portal vein,the left branch and the right branch of portal vein were also measured.The differences in subj ective scores of image quality,CT values,signal to noise ratio (SNR),contrast to noise ratio (CNR)between the AA and portal vein were analyzed.Results The CT values of AA in 270,320 and 370 groups in arterial phase at the level of the porta hepatis were(302.28±24.81)HU,(302.14±33.76)HU and (303.49±35.85)HU,those at the right renal artery level were(304.01±25.55)HU,(305.22±33.63)HU and(306.14±31.51)HU,and at the bifurcation of iliac artery level were (306.85±23.26)HU,(308.68±31.80)HU and (310.22±29.76)HU.There were no significant differences among the three groups (P>0.05).The CT values of the main portal vein in portal phase were (133.94±8.41)HU, (1 3 5.6 3 ± 11.82)HU and(135.43±10.08)HU,those of the left branch were(134.21±6.04)HU,(135.12±9.97)HU and(135.31±8.82)HU, those of the right branch were (133.77±7.06)HU,(134.09±11.53)HU and (136.04±10.61)HU.There were also no significant differences among the three groups (P>0.05).No statistical differences were observed among the three groups in the scores of image quality, SNR and CNR(P>0.0 5).Conclusion Similar CT enhanced effect and excellent image quality can be obtained by using different iodine concentration of contrast agent with the fixed iodine delivery rate and total iodine load in abdominal vessels.