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The quality of high-resolution Echo Planar images of the human brain has improved greatly in recent years, enabled by novel multi-channel receiver coil arrays and parallel imaging. However, in regions with local field inhomogeneity, EPI artifacts limit which parts of the brain can be imaged successfully. In this work, we present evidence that certain image artifacts can be attributed to nonlinear...
Functional MR Imaging (fMRI) is a widely used mechanism to non-invasively evaluate and assess neural activity in the brain, with echo planar imaging (EPI) the most common sequence used in fMRI studies. EPI methods are attractive because they provide functional imaging data of the whole brain at reasonable temporal resolutions. However, EPI is notoriously susceptible to multiple artifacts. This includes...
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