Equilibrium phase images of the liver using a contrast-enhancement boost instead of the portal vein phase  

作　　者：Yuji Tachibana Kenichiro Otsuka Tomoaki Shiroo Yoshiki Asayama 

机构地区：[1]Department of Radiological Sciences,Faculty of Medicine,Fukuoka International University of Health and Welfare,Fukuoka 814-0001,Japan [2]Department of Radiology,Faculty of Medicine,Oita University,Yufu 879-5593,Oita,Japan [3]Department of Radiology,Division of Medical Technology,Oita University Hospital,Yufu 879-5593,Oita,Japan

出　　处：《World Journal of Radiology》2025年第2期28-37,共10页世界放射学杂志(英文)

摘　　要：BACKGROUND Three-phase dynamic computed tomography imaging is particularly useful in the liver region.However,dynamic imaging with contrast media has the disadvantage of increased radiation exposure due to multiple imaging sessions.We hypothesized that the contrast enhancement boost(CE-boost)technique could be used to enhance the contrast in equilibrium phase(EP)images and produce enhancement similar to that of portal vein phase(PVP)images,and if this is possible,EP imaging could play the same role as PVP imaging.We also speculated that this might allow the conversion of three-phase dynamic imaging to biphasic dynamic imaging,reducing patients’radiation exposure.AIM To determine if the CE-boost of EP,CE-boost(EP)is useful compared to a conventional image.METHODS We retrospectively analyzed the cases of 52 patients who were diagnosed with liver cancer between January 2016 and October 2022 at our institution.From these computed tomography images,CE-boost images were generated from the EP and plane images.We compared the PVP,EP,and CE-boost(EP)for blood vessels and hepatic parenchyma based on the contrast-to-noise ratio(CNR),signal-to-noise ratio,and figure-of-merit(FOM).Visual assessments were also performed for vessel visualization,lesion conspicuity,and image noise.RESULTS The CE-boost(EP)images showed significant superiority compared to the PVP images in the CNR,signal-to-noise ratio,and FOM except regarding the hepatic parenchyma.No significant differences were detected in CNR or FOM comparisons within the hepatic parenchyma(P=0.62,0.67).The comparison of the EP and CE-boost(EP)images consistently favored CE-boost(EP).Regarding the visual assessment,the CE-boost(EP)images were significantly superior to the PVP images in lesion conspicuity,and the PVP in image noise.The CE-boost(EP)images were significantly better than the EP images in the vessel visualization of segmental branches of the portal vein and lesion conspicuity,and the EP in image noise.CONCLUSION The image quality of CE-boost(EP)images was compara

关 键 词：LIVER Computed tomography Contrast enhancement boost Image quality Lesion conspicuity 

分 类 号：R575[医药卫生—消化系统]