Meeting Banner
Abstract #3791

Eye Movement Artifact Suppression Via 2D Spatially Selective RF-Excitation

Paul Wighton1, Matthew Dylan Tisdall1, Andr J. W. van der Kouwe1

1Department of Radiology, MGH, Martinos Center for Biomedical Imaging, Charlestown, MA, United States

In this abstract, we explore the suppression of eye-movement artifacts using a subject-specific, spatially-selective RF-excitation pulse designed to excite only the subject's brain, ensuring no signal (and therefore no artifact) originates from the eyes. A 3D-encoded FLASH sequence was augmented with a 2D-selective RF-excitation pulse. A subject specific 2D brain-excitation shape was generated using a FreeSurfer segmentation of the subject acquired in a previous scan. Compared to a conventional FLASH scan, eye-motion artifacts were significantly suppressed with our modified spatially-selective RF-excitation scan.

Abstract PDF Presentation Video

Keywords

abstract acknowledgments acquisition additional additionally aligned allow anterior appears array artifact artifacts audience augmented automatic automatically bandwidth biomedical blipped body bottom brain cerebral channel chosen clear coil coils comparing completely conditions considered continuous control cortex create crescent currently degree designed dimensional durations either employed employing encode encoded encoding ensuring error excitation excitations excite exciting exhibit explore extended extends eyes feasible flash foundation frontal functional funded generated geometry grants head human illustrates impact induces initial instructed interpretation interval keep leftmost like looking make manner mask masked matrix medical medicine modified moon motion motionless move movement needed negatively occurred originates outside parallel partition physiological placing planar portion positioning practical prescription previous principle processing pulse pulses radiology random rather reduction registration researchers resolution rightmost scanner segmentation selective separate session shape side significantly since slab slice slices slight slightly space spatially still subject superior suppress suppressed suppression system target train trajectory transmit traversed volumes whole