门静脉CT成像技术中门静脉增强峰值时间的相关影响因素  

Influence factors of the peak time in computed tomography portal venography

作　　者：丁毅[1] 宋彬[1] 孙熙临 徐晶晶[1] Ding Yi;Song Bin;Sun Xilin;Xu Jingjing(Department of Radiology,Minhang Hospital,Fudan University(Central Hospital of Minhang District),Shanghai 201199,China)

机构地区：[1]复旦大学附属闵行医院(上海市闵行区中心医院)放射科,上海201199

出　　处：《中国医师杂志》2022年第5期645-648,共4页Journal of Chinese Physician

摘　　要：目的评估门静脉CT成像技术中门静脉增强峰值时间的相关影响因素。方法回顾性收集2020年10月至2021年12月复旦大学附属闵行医院临床行肝脏灌注(CTP)检查的28例患者,在门静脉左、右支分叉层面获取门静脉主干和腹主动脉CT增强时间密度曲线,测量门静脉增强峰值时间、腹主动脉峰值时间以及门静脉峰值时肝脏和脾脏实质增强CT值,进行Pearson相关与回归分析。结果腹主动脉峰值时间为(16.39±2.68)s,门静脉峰值时间为(27.12±4.65)s,门静脉峰值时肝脏和脾脏实质增强CT值分别为(84.64±20.21)HU、(142.28±25.15)HU,门静脉峰值时间与腹主动脉峰值时间呈正相关(r=0.825,P<0.001),与肝脏、脾脏增强CT值之间无统计学相关性(均P>0.05)。多元线性回归分析结果显示,腹主动脉峰值时间是门静脉峰值时间的独立影响因素(b=1.326,t=5.874,P<0.001)。回归方程为:门静脉峰值时间=4.185+1.451×腹主动脉峰值时间。肝硬化组门静脉峰值时间为(27.78±4.48)s,非肝硬化组门静脉峰值时间为(26.8±4.81)s,组间差异无统计学意义(P=0.614)。结论门静脉增强峰值时间与腹主动脉峰值时间呈线性相关,结果有助于优化门静脉CT成像前扫描延迟时间设定。Objective To evaluate the influence factors of the peak time in computed tomography(CT)portal venography.Methods Twenty-eight patients who underwent CT perfusion(CTP)examination in Minhang Hospital Affiliated to Fudan University from October 2020 to December 2021 were retrospectively collected.The CT enhancement time-density curves of the main portal vein trunk and abdominal aorta were obtained at the cross section of the left and right branches of portal vein.The peak time of portal vein and abdominal aorta,the enhanced CT attenuation of the liver and spleen parenchyma enhancement at the peak value of portal vein were measured.Pearson correlation and regression analysis were performed.Results The peak time of abdominal aorta was(16.39±2.68)s,and portal vein was(27.12±4.65)s.The enhanced CT attenuation of liver and spleen parenchyma were(84.64±20.21)HU and(142.28±25.15)HU,respectively.The peak time of portal vein was positively correlated with the peak time of abdominal aorta(r=0.825,P<0.001),and there was no statistical correlation with the enhanced CT values of liver and spleen.Multiple linear regression analysis showed that the peak time of abdominal aorta was an independent factor affecting the peak time of portal vein(b=1.326,t=5.874,P<0.001).The regression equation was the peak time of portal vein=4.185+1.451×the peak time of abdominal aorta.The peak time of portal vein in cirrhosis group was(27.78±4.48)s,and that in noncirrhosis group was(26.8±4.81)s,with no significant difference between the two groups(P=0.614).Conclusions There was a linear correlation between the peak time of portal vein and the abdominal aorta,and the results could be helpful to optimize the setting of delay time before CT portal venography.

关 键 词：体层摄影术 X线计算机 门静脉造影术 峰值时间 

分 类 号：R816.5[医药卫生—放射医学]