摘要
目的:探讨多层螺旋CT bolus tracking技术对肝脏门静脉成像的价值。方法:100例健康人按触发点阈值随机分为5组,使用bolus tracking技术行全肝增强扫描,测量腹主动脉、门静脉、肝实质的强化CT值及各组到达设定阈值的时间,并进行门静脉三维重建(MIP及VR法)和成像质量评价。结果:门静脉与肝实质CT值差(PV-L值):第1组至第5组分别为(37.39±10.46)Hu、(65.98±18.75)Hu、(96.21±15.38)Hu、(75.14±14.57)Hu、(52.39±15.46)Hu;延迟时间第1组至第5组分别为(31.39±3.46)s、(35.79±4.17)s、(40.50±4.99)s、(45.25±5.09)s、(49.92±6.34)s;门静脉成像质量优秀率第1组至第5组分别为30%、65%、95%、80%、40%。结论:多层螺旋CT bolus tracking技术门静脉成像方法能监测个体差异,明显提高门静脉5级以上分支的显示率;第3组触发点阈值15 Hu为其最佳扫描阈值。
Objective：To evaluate the value of using Bolus tracking trigger scan technology in muhi-slice spiral CT portography （MSCTP）. Methods ：100 patients were divided into five groups randomly by different threshold value. The whole liver was scanned with bolus tracking trigger scan technology in portal-venous phase with enhanced. The average added value of contrast enhancement in abdominal aorta,liver parencbyma, portal vein, P-L value and the delay time of each group was measured. MSCT rendering for order branches of portal vein in every case, and the quality of the pictures were evaluated. Results： The maximum density differences between the portal vein and liver （PV-L） in five groups were （37.39±10.46） Hu,（65.98±18.75） Hu,（96.21 ±15.38） Hu,（75.14±14.57） Hu,（52.39± 15.46） Hu,and the time reaching were （31.39 ±3.46） s,（35.79 ±4.17） s,（40.50 ±4.99） s,（45.25 ±5.09） s, （49.92 ± 6.34） s. The visualization rates of up-fifth order branch of portal vein were 30 % ,65 % ,95 % ,80 % ,40 %. Conelusion：MSCTP with bolus tracking trigger scan technology can monitor individual differences and improved visualization rates of fifth-sixth order branch of portal vein, and threshold value in group 3 （ with 15 Hu added to the background ） is the best for MSCTP
出处
《广州医学院学报》
2009年第2期21-25,共5页
Academic Journal of Guangzhou Medical College
