Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI.
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 dyn...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2013
|
| _version_ | 1797063655847624704 |
|---|---|
| author | Rotenberg, D Chiew, M Ranieri, S Tam, F Chopra, R Graham, S |
| author_facet | Rotenberg, D Chiew, M Ranieri, S Tam, F Chopra, R Graham, S |
| author_sort | Rotenberg, D |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-06T21:03:02Z |
| format | Journal article |
| id | oxford-uuid:3b8116b8-d26e-456d-a79e-6f72a61bdbdd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:03:02Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:3b8116b8-d26e-456d-a79e-6f72a61bdbdd2022-03-26T14:08:05ZReal-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3b8116b8-d26e-456d-a79e-6f72a61bdbddEnglishSymplectic Elements at Oxford2013Rotenberg, DChiew, MRanieri, STam, FChopra, RGraham, SHead 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. |
| spellingShingle | Rotenberg, D Chiew, M Ranieri, S Tam, F Chopra, R Graham, S Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title | Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title_full | Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title_fullStr | Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title_full_unstemmed | Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title_short | Real-time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional MRI. |
| title_sort | real time correction by optical tracking with integrated geometric distortion correction for reducing motion artifacts in functional mri |
| work_keys_str_mv | AT rotenbergd realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri AT chiewm realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri AT ranieris realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri AT tamf realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri AT choprar realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri AT grahams realtimecorrectionbyopticaltrackingwithintegratedgeometricdistortioncorrectionforreducingmotionartifactsinfunctionalmri |