Figure 3.

Sampling scheme for fMRI data acquisition. a) EVI trajectory traversed in one TR: data along the ${\text{k}}_{\text{x}}$ (readout) and ${\text{k}}_{\text{y}}$ (phase encoding) directions are collected in EPI trajectories, and 5 phase encodings are acquired along ${\text{k}}_{\text{z}}$ using blipped phase gradients (see Fig. 1). b) $\left(\text{k},T\right)$-space sampling: full data frames are collected with 8 TRs and sparse data frames are collected with 2 TRs; the resulting frame rate is 3 seconds.