Influence of Mismarking Fiducial Locations on EEG Source Estimation
| Autor: | Shirazi, Seyed Yahya, Huang, Helen J. |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
medicine.diagnostic_test 0206 medical engineering 02 engineering and technology Electroencephalography Geodesy 020601 biomedical engineering 03 medical and health sciences Dipole 0302 clinical medicine medicine Fiducial marker 030217 neurology & neurosurgery Geology 030304 developmental biology |
| Zdroj: | NER |
| Popis: | Mismarking locations of the fiducials can have a significant influence on the digitized electrode locations and cortical source estimation using high-density EEG. Under-standing and quantifying how uncertainties in the fiducial locations affect the locations of cortical sources is important for interpreting EEG analyses. We systematically shifted fiducial locations to investigate the relationship between variations of fiducial locations and the corresponding estimations of the source locations. We quantified the uncertainty of the dipole locations using the enclosing volume of the dipole locations and the maximum width of the dipole cluster. Shifting fiducial locations 1.5 cm increased the uncertainty of the dipole locations to span a volume >1 cm3 and about 2.5 cm wide. Results suggest that the fiducials need to be digitized accurately within at least 0.5 cm of the absolute actual fiducial location to limit the uncertainty of a dipole location to |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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