CT理论与应用研究2026，Vol.35Issue(2)：257-264,8.DOI:10.15953/j.ctta.2025.292
双能CT虚拟单能级成像在优化胰周静脉显影的应用价值
The Application Value of Dual-energy CT Virtual Monoenergetic Images in Optimizing Peripancreatic Vein Imaging
摘要
Abstract
Objective:To investigate the value of virtual monoenergetic images(VMI)in dual-energy CT(DECT)for optimizing peripancreatic vein imaging.Methods:Dual-energy CT enhanced scans(100 kV/Sn 150 kV)of 65 patients with pancreatic ductal adenocarcinoma(PDAC)and 60 healthy controls were retrospectively analyzed,and portal stage images were reconstructed at 45 keV monoenergetic and linear fusion reconstruction with a weight factor of M0.6.CT values of the pancreatic parenchyma,portal vein trunk,superior mesenteric vein,and subcutaneous fat were measured.Additionally,the signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),and standard deviation(SD)of the CT values of subcutaneous fat were calculated.The diameters of the posterior superior pancreaticoduodenal vein(PSPDV),anterior superior pancreaticoduodenal vein(ASPDV),and gastrocolic trunk(GCT)were measured,and the display effect of these vessels was evaluated using the five-point method.Results:The CT values,SNR,and CNR of each blood vessel and pancreatic parenchyma on 45 keV VMI were significantly higher than those on linear fusion images(PEI).The image noise of 45 keV VMI was significantly higher than that of PEI.The peripancreatic venule score on 45 keV VMI was significantly higher than that on PEI.In the PDAC group,excluding pancreatic tail tumors,there were 44 cases of non-resectable tumors.Twenty patients had peripancreatic small vein dilatation,accounting for 45%of non-resectable tumors;16 patients had resectable tumors;and two patients had peripancreatic small vein dilatation,accounting for 12.5%of resectable tumors.A statistical correlation may exist between peripancreatic small vein dilatation and PDAC resectability.In the control group,three patients had peripancreatic small vein dilatation.This suggests a statistical correlation between peripancreatic small vein dilatation and PDAC positivity.Conclusion:Compared with PEI,DECT 45 keV VMI can significantly enhance imaging of peripancreatic veins,and the dilatation of peripancreatic venules can serve as an important reference for unresectable PDAC.关键词
双能量CT/虚拟单能级成像/胰腺导管腺癌/胰周静脉Key words
dual-energy CT/virtual monoenergetic images/pancreatic ductal adenocarcinoma/peripancreatic veins分类
医药卫生引用本文复制引用
周卓航,梁洪伟,周旸,李咏梅,沈心楠,王美淇,王艺婷,张志伟..双能CT虚拟单能级成像在优化胰周静脉显影的应用价值[J].CT理论与应用研究,2026,35(2):257-264,8.基金项目
重庆市科卫联合医学科研项目面上项目(基于能量CT多参数成像联合机器学习探讨胰腺癌根治性切除术后早期复发风险及复发模式研究(2025MSXM043)). （基于能量CT多参数成像联合机器学习探讨胰腺癌根治性切除术后早期复发风险及复发模式研究(2025MSXM043）
