摘要
目的探讨多层螺旋CT(MSCTA)肝脏血管成像的显影参数及图像质量影响因素。方法分析80例健康者和90例肝硬化患者的肝脏血管成像技术参数,分别测量腹主动脉(AA)、门静脉(PV)、肝实质(L)的CT值,比较不同注射速率下AA、PV、L、PV—L的峰值、达峰值时间、域值、延迟时间及图象质量。结果不同注射速率(2.5ml/s、3.5ml/8、4.5ml/s)下各时间点:AA最大峰值[(223.9±16.7)Hu、(273.3±12.7)Hu、(301.3±14.6)Hu]高于PV—L[(65.1±9.5)Hu、(83.7±17.9)Hu、(96.5±15.6)Hu](均P〈0.01);AA达峰值时间[(46.6±3.8)s、(36.2±6.5)s、(31.4±5.8)s]低于PV-L[(56.6±4.2)s、(49.6±5.0)s、(41.6±5.8)s](均P〈0.05);在MSCTA图像上,注射速率4.5ml/s组显示(肝动脉:A级15例、B级4例、C级1例、D级0例,门静脉:A级15例、B级4例、C级1例)明显高于2.5ml/8组(肝动脉:A级4例、B级5例、C级10例、D级3例,门静脉:A级2例、B级12例、C级6例)(均P〈0.01);肝硬化组的最佳预设阔值180~220Hu高于正常组150~180Hu(P〈0.05)。结论注射速率可影响MSCTA肝脏血管成像质量,健康者和肝硬化患者的MSCTA技术参数不同。
Objective To investigate the imaging parameters in hepatic angiography 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 in jection 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 casos,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 hepatocirrhosis 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.
出处
《中国基层医药》
CAS
2009年第2期209-210,共2页
Chinese Journal of Primary Medicine and Pharmacy