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- W2394353462 abstract "Objective:To evaluate the effect of breathing motion on the quality of monochromatic image and accuracy of basis density image reconstructed through kVp switching technique using a dynamic phantom.Methods:The motional altitude of dynamic phantom was set as±2 mm,±6 mm and±8mm,and motional frequency was 5,10,15 beats per minute.Eighteen tubes(diameter,18 mm) were filled with iodine solution of different density(mg/ml),which were 0.5,1.0,2.0,5.0,10.0,s 20.0,30.0,50.0,repectively.All tubes were embeded in phantom's circumference and the phantom was scaned using kVp switching technique(GSI).keV monochromatic images and basis density images were reconstructed based on GSI raw data.Image quality of keV images and accuracy of density images were assessed by three experienced doctors.Mann-Whitney U method was used for statistical analysis.Results:As for image quality of monochromatic images,no statistal difference was found between motion status and rest status(P0.05).The accuracy error of motion status was 5.6% and didn't show statistical difference compared with standard value(P0.05).Conclusion:kVp switching technique of 0.5ms period can provide us with high quality keV images and accuracy density images on condition that breathing motion occurs." @default.
- W2394353462 created "2016-06-24" @default.
- W2394353462 creator A5042727018 @default.
- W2394353462 date "2011-01-01" @default.
- W2394353462 modified "2023-09-27" @default.
- W2394353462 title "Quantitative assessment of the respirometric effect on image quality using kVp switching technique: a dynamic phantom study" @default.
- W2394353462 hasPublicationYear "2011" @default.
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