Addressing a systematic vibration artifact in diffusion-weighted MRI
نویسندگان
چکیده
منابع مشابه
Addressing a systematic vibration artifact in diffusion-weighted MRI.
We have identified and studied a pronounced artifact in diffusion-weighted MRI on a clinical system. The artifact results from vibrations of the patient table due to low-frequency mechanical resonances of the system which are stimulated by the low-frequency gradient switching associated with the diffusion-weighting. The artifact manifests as localized signal-loss in images acquired with partial...
متن کاملAddressing a Systematic Vibration Artefact in Diffusion-weighted MR Images
Introduction: The large gradient lobes employed in diffusion-weighted imaging are known to cause vibrations of the patient table. These vibrations can affect the diffusion-weighted signal, as demonstrated by changes in the measured apparent diffusion coefficient in a phantom with and without mechanical contact to the patient table [1]. Here we identify an artefact in-vivo that is caused by the ...
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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 scanne...
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ژورنال
عنوان ژورنال: Human Brain Mapping
سال: 2009
ISSN: 1065-9471,1097-0193
DOI: 10.1002/hbm.20856