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Reproducibility of multi‐slice spiral computed tomography scans:An experimental study
Author(s) -
van Straten Marcel,
Venema Henk W.,
Hartman Joris,
den Heeten Gerard J.,
Grimbergen Cornelis A.
Publication year - 2004
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1796131
Subject(s) - imaging phantom , scanner , spiral (railway) , computed tomography , helical scan , tomography , rotation (mathematics) , reproducibility , nuclear medicine , interpolation (computer graphics) , computed radiography , optics , materials science , image quality , physics , computer science , mathematics , medicine , radiology , artificial intelligence , acoustics , motion (physics) , mathematical analysis , statistics , magnetic tape , tape recorder , classical mechanics , image (mathematics)
In multi‐slice spiral computed tomography (CT) images interpolation artifacts are present. The relationship between the x‐ray tube rotation angle and these artifacts is demonstrated. A head phantom was repeatedly scanned with a four‐slice CT scanner at different pitch values. Two scans, made with identical scan parameters, nearly always have different x‐ray tube starting angles. Consequently, artifacts appeared differently and residual artifacts appeared when subtractions were made. We conclude that only if the x‐ray tube starting angle is equal for both scans or if a very low pitch is used, images are highly reproducible.