Blipped‐controlled aliasing in parallel imaging for simultaneous multislice echo planar imaging with reduced g ‐factor penalty
Harvard University · Massachusetts General Hospital · +3 more institutions
Abstract
Simultaneous multislice Echo Planar Imaging (EPI) acquisition using parallel imaging can decrease the acquisition time for diffusion imaging and allow full-brain, high-resolution functional MRI (fMRI) acquisitions at a reduced repetition time (TR). However, the unaliasing of simultaneously acquired, closely spaced slices can be difficult, leading to a high g-factor penalty. We introduce a method to create interslice image shifts in the phase encoding direction to increase the distance between aliasing pixels. The shift between the slices is induced using sign- and amplitude-modulated slice-select gradient blips simultaneous with the EPI phase encoding blips. This achieves the desired shifts but avoids an…
Citation impact
- FWCI
- 28.45
- Percentile
- 100%
- References
- 30
Authors
6- KSKawin SetsompopCorresponding
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- BGBorjan Gagoski
IIT@MIT
- JRJon̈athan R. Polimeni
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- TWThomas Witzel
Massachusetts General Hospital, Harvard–MIT Division of Health Sciences and Technology, Athinoula A. Martinos Center for Biomedical Imaging
- VJVan J. Wedeen
Harvard University, Massachusetts General Hospital, Harvard–MIT Division of Health Sciences and Technology, Athinoula A. Martinos Center for Biomedical Imaging
Topics & keywords
- Aliasing
- Echo-planar imaging
- Multislice
- Artifact (error)
- Orientation (vector space)
- Acceleration
- Diffusion MRI
- Voxel