The Application Value of Monoenergetic Imaging on Dual-layer Spectral Detector Computed Tomography in Dacryocystography
NING xianying
HU Liu
FAN Wenliang
YU Jianming
LEI Ziqiao
Abstract：Objective:This study aimed to explore the value of monoenergetic imaging using dual-layer spectral detector computed tomography(CT)for dacryocystography.Methods:Dacryocystography was performed in patients with clinically suspected lacrimal duct obstruction using a Philips IQon dual-layer spectral detector CT.The objective evaluation included the signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of each monoenergetic image,subjective rating of image quality,and the site and degree of lacrimal duct obstruction.Results:The SNR and CNR of 50 keV images was 9.76±13.44 and 10.24±13.88,respectively,which were significantly lower than that of 70～200 keV images.The subjective scores for 50 keV and conventional image quality were(5,5)and(4,5),respectively,indicating good""consistency in subjective scores among radiologists.Conclusion:The SNR and CNR of CT dacryocystography increased significantly at 50 keV.
Keywords：spectral CTmono energetic imagingdacryocystography
Publication Date：2024-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 677-682 )