Magnetoencephalography (MEG) is the measurement of the magnetic fields generated outside the head by the brain’s electrical activity. The technique offers the promise of high temporal and spatial resolution. There is however an ambiguity in the inversion process of estimating what goes on inside the head from what is measured outside. Other techniques, such as functional Magnetic Resonance Imaging (fMRI) have no such inversion problems yet suffer from poorer temporal resolution. In this study we examined metrics of mutual information and linear correlation between volumetric images from the two modalities. Measures of mutual information reveal a significant, non-linear, relationship between MEG and fMRI datasets across a number of frequency bands.
|Title of host publication||2003 IEEE Workshop on Statistical Signal Processing|
|Place of Publication||New York, NY (US)|
|Number of pages||3|
|Publication status||Published - Sept 2003|
|Event||IEEE Workshop on Statistical Signal Processing, SSP 2003 - St. Louis, United States|
Duration: 28 Sept 2003 → 1 Oct 2003
|Conference||IEEE Workshop on Statistical Signal Processing, SSP 2003|
|Period||28/09/03 → 1/10/03|
Bibliographical note2003 IEEE Workshop on Statistical Signal Processing, 28 September - 1 October 2003, St Louis, Missouri (US).
- magnetic fields
- electrical activity
- temporal resolution
- spatial resolution
- magnetic resonance imaging
- frequency bands