Figure 3.

Crosstalk versus relative fMRI weighting. Crosstalk is shown for 10 sources (point and 2 cm in diameter), with and without orientation constraint. The relative fMRI weighting was either 0%, 90%, 99%, or 100%. The optimal fMRI weighting requires a compromise between resolving fMRI visible sources (i.e., higher fMRI weighting) and minimizing distortion from fMRI invisible sources (i.e., lower fMRI weighting). The results indicate that a 90% fMRI weighting greatly reduces the crosstalk from fMRI visible sources, while only slightly increasing the crosstalk from fMRI invisible sources.