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- W2365888213 abstract "Objective To assess spatial resolution performance of various iDose reconstruction levels at Brilliance iCT 256 with brain scanning protocol under varied conditions.Methods CT images of brain were obtained using Brilliance iCT 256 and CT image quality phantom test.CT images were reconstructed using iDose 4TMand filter back projection(FBP).Modulation transfer function(MTF)of reconstructed CT images was calculated and compared.Results ①MTF of image with iDose was 1.75%—115.62% greater than FBP at equal radiation dose level.②Spatial resolution in x-O-y plane would decrease at some extend when scanning slice depth decreases.③For varied iDose levels,iDose(6)got the best MTF when slice depth was 0.9mm,while iDose(5)gained the best MTF when slice depth was 2.5mm.④No obvious difference of MTF was found when pitch varied from 0.203to 0.391while voltage,mill-ample multiple second and slice depth constant kept the same.⑤No obvious difference of MTF was found at the same mill-ample multiple second constant and different mill-ample and scanning time.Conclusion iDose can obviously increase spatial resolution at the same dose level,and spatial resolution of CT image with iDose reconstruction is not too much sensitive to pitch and lamp current to some extent. Reconstruction level should suit scanning depth in order to acquire best image quality." @default.
- W2365888213 created "2016-06-24" @default.
- W2365888213 creator A5006912729 @default.
- W2365888213 date "2014-01-01" @default.
- W2365888213 modified "2023-09-24" @default.
- W2365888213 title "Spatial resolution investigation on iDose 4~(TM) with 256-slice CT in brain spiral scanning:A phantom study" @default.
- W2365888213 hasPublicationYear "2014" @default.
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