Investigation of vibration-induced artifact in clinical diffusion-weighted imaging of pediatric subjects

Human Brain Mapping
Madison M BerlCarlo Pierpaoli

Abstract

It has been reported that mechanical vibrations of the magnetic resonance imaging scanner could produce spurious signal dropouts in diffusion-weighted images resulting in artifactual anisotropy in certain regions of the brain with red appearance in the Directionally Encoded Color maps. We performed a review of the frequency of this artifact across pediatric studies, noting differences by scanner manufacturer, acquisition protocol, as well as weight and position of the subject. We also evaluated the ability of automated and quantitative methods to detect this artifact. We found that the artifact may be present in over 50% of data in certain protocols and is not limited to one scanner manufacturer. While a specific scanner had the highest incidence, low body weight and positioning were also associated with appearance of the artifact for both scanner types evaluated, making children potentially more susceptible than adults. Visual inspection remains the best method for artifact identification. Software for automated detection showed very low sensitivity (10%). The artifact may present inconsistently in longitudinal studies. We discuss a published case report that has been widely cited and used as evidence to set policy about diagn...Continue Reading

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Citations

Dec 25, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Dominik WeidlichDimitrios C Karampinos
May 16, 2017·Autism Research : Official Journal of the International Society for Autism Research·Seraphina K SoldersRalph-Axel Müller
Feb 14, 2021·Journal of Neuroscience Methods·Peter F CookBen A Inglis

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