The study of optimal imaging parameters In hepatic angiography using multi-slice CT angiography
10.3760/cma.j.issn.1008-6706.2009.02.009
- VernacularTitle:螺旋CT肝脏血管成像质量影响因素探讨
- Author:
Xingjie DENG
- Publication Type:Journal Article
- Keywords:
Tomography,X-ray computed;
Angiagraphy;
Liver cirrhosis
- From:
Chinese Journal of Primary Medicine and Pharmacy
2009;16(2):209-210
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the imaging parameters in hepatic angiagraphy using multi-slice CT angiography(MSCTA).Methods The imaging parameters in 80 cases of healthy persons and 90 cases with liver cirrhosis were analyzed.The value of CT with abdominal aorta(AA) ;portal vein(PV) and liver(L) were measured respectively.To compare peak;peak time;liminal value;delay time and image quality at AA;PV;L;PV-L under different injection flow rate.Results The AA maximum peak[(223.9±16.7)Hu,(273.3 ± 12.7)Hu,(301.3 ±14.6)Hu]higher than the PV-L[(65.1 ± 9.5 ) Hu,(83.7 ± 17.9) Hu,(96.5 ± 15.6) Hu ]( P＜0.01 ) ;AA reached the peak hours[(46.6 ±3.8)s,(36.2 ±6.5)s,(31.4 ±5.8) s]lower than the PV-L[(56.6 ±4.2)s,(49.6 ± 5.0) s,(41.6±5.8)s](P ＜0.05) in different injection flow rate(2.5ml/s,3.5ml/s,4.5ml/s) ;The 4.5ml/s group in MSCTA show(hepatic artery:A grade 15 cases,B grade 4 cases,C grade 1 case,D grade 0 case,the portal vein:A grade 15 cases,B grade 4 cases,C grade 1 case) were significantly higher than 2.5 ml/s group( hepatic artery:A grade 4 cases,B grade 5 cases,C grade 10 cases,D grade 3 cases,the portal vein:A grade 2 cases,B grade 12 cases,C grade 6 cases) (all P＜0.01 ).The value of liminal(180-220Hu) in hepatocirrhesis group were lower than 150-180Hu in normal group(P＜0.05).Conclusion The right MSCTA imaging parameters Could improve the image quality in patients with liver cirrhosis.
