Real‐time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI
Citations Over TimeTop 15% of 2012 papers
Abstract
Head motion artifacts are a major problem in functional MRI that limit its use in neuroscience research and clinical settings. Real-time scan-plane correction by optical tracking has been shown to correct slice misalignment and nonlinear spin-history artifacts; however, residual artifacts due to dynamic magnetic field nonuniformity may remain in the data. A recently developed correction technique, Phase Labeling for Additional Coordinate Encoding, can correct for absolute geometric distortion using only the complex image data from two echo planar images with slightly shifted k-space trajectories. An approach is presented that integrates Phase Labeling for Additional Coordinate Encoding into a real-time scan-plane update system by optical tracking, applied to a tissue-equivalent phantom undergoing complex motion and an functional MRI finger tapping experiment with overt head motion to induce dynamic field nonuniformity. Experiments suggest that such integrated volume-by-volume corrections are very effective at artifact suppression, with potential to expand functional MRI applications.
Related Papers
- → Going back to basics in design science: from the information technology artifact to the information systems artifact(2014)181 cited
- → Dynamics in artifact ecologies(2012)129 cited
- Going Back to Basics in Design: From the IT Artifact to the IS Artifact(2013)
- → An Artifact Evaluation of NDP(2020)5 cited
- Computed Radiography 영상에서 Parameter에 의한 Artifact 원인과 해결방안(2009)