✦ LIBER ✦

Artifacts due to stimulus correlated motion in functional imaging of the brain

✍ Scribed by Joseph V. Hajnal; Ralph Myers; Angela Oatridge; Jane E. Schwieso; Ian R. Young; Graeme M. Bydder

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 992 KB
Volume: 31
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.1910310307

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

To assess the effect of stimulus correlated motion on the appearance of functional magnetic resonance images, conventional visual and motor protocols were each performed by four normal volunteers and an image co‐registration technique was used to retrospectively monitor subject motion. In three studies synthetic data sets were constructed from single baseline images using the positional information obtained from the co‐registration procedure. Cumulative difference images were then created from both the synthetic and functional image sets. Stimulus correlated motion was detected in all eight studies and the synthetic cumulative difference images showed striking similarities to the equivalent functional images in each case.

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