The aortic and hepatic contrast enhancement at CT and its correlations with various body size index
10.3760/cma.j.issn.1005-1201.2020.02.003
- VernacularTitle: 身体指数与主动脉和肝脏CT强化程度的相关性研究
- Author:
Maoqing HU
1
;
Fang LONG
1
;
Wansheng LONG
1
;
Menghuang WEN
2
;
Zaiyi LIU
2
;
Changhong LIANG
2
Author Information
1. Department of Radiology, Jiangmen Central Hospital, Guangdong Province, Jiangmen 529030, China
2. Department of Radiology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- Publication Type:Journal Article
- Keywords:
Contrast media;
Tomography, X-ray computed;
Aorta;
Liver
- From:
Chinese Journal of Radiology
2020;54(2):101-106
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of height (HT), total body weight (TBW), body mass index (BMI), lean body weight (LBW), body surface area (BSA) and blood volume (BV) on aortic and liver contrast enhancement during upper abdominal contrast-enhanced CT scans.
Methods:One hundred and thirteen enrolled patients underwent upper abdominal multiphase contrast-enhanced CT scans. The enhancement (ΔHU) of aorta in hepatic arterial phase and liver parenchyma in portal venous phase were measured and calculated. The ΔHU values difference of aorta and liver parenchyma in subgroups between males and females, TBW<60 kg and TBW≥60 kg, BMI<25 kg/m2 and BMI≥25 kg/m2 were compared. To evaluate the effect of the patient′s body parameters on aortic and hepatic enhancement, we performed simple linear regression analyses between the change in CT numbers per gram of iodine (ΔHU/gI) at aorta and liver and each of the following: HT, TBW, BMI, LBW, BSA, and BV. Pearson and t test were used.
Results:The mean ΔHU values of aorta and liver were significantly lower at males than that of at females (P<0.05). They were higher at TBW<60 kg patients than at TBW≥60 kg patients(P<0.05), and the mean ΔHU values of the liver at BMI<25 kg/m2 patients were significantly higher than at BMI≥25 kg/m2 patients(P<0.05). The proportion of the ΔHU values at liver less than 50 HU was higher at males (18.3%, 11/60) than at females (7.5%, 4/53). The most obvious negative correlation coefficients were found between the ΔHU/gI of aorta and LBW at hepatic arterial phase (r=-0.559, P<0.01), and between the ΔHU/gI of liver and BSA at portal venous phase (r=-0.680, P<0.01).
Conclusion:LBW or BSA could be the alternative body index to TBW for the calculation of personalized iodine dose protocol at aortic and liver enhanced CT scans.
