Figure 4.

Demonstrating slice‐dependent delay in the extracted HRF from two adjacent slice (slices 17 and 18) in the significantly activated brain area due to auditory stimulus of a typical subject's (top row) unsmoothed data (a) with and (b) without proper slice timing correction. Without slice timing correction, FLOBS accurately captures the same amount of delay in the extracted HRF that are imposed during their acquisition. Bottom row illustrates a linear regression of slice‐dependent HRF time to peak vs the acquisition delay of that slice with and without STC for 35 subjects. Without STC, there is a one‐to‐one (slope is equal to one, β = −0.96*) relationship between the slice‐dependent HRF time to peak and the slice acquisition delay. With STC, this relationship is completely removed. [Color figure can be viewed at http://wileyonlinelibrary.com]