Fig. 4.

Dependence of signal dropouts on the local effective echo time TE (at 1.5 T). a Anatomical FLASH image and maps of susceptibility-induced in-plane gradients for the same slice. b The left two images show TE maps for both phase-encoding (PE) polarities, and the third image shows the difference of the two TE maps. c The left two images show EPI images for both PE polarities. The third image shows predicted dropouts due to susceptibility-induced gradients in the readout (RO) direction for both PE polarities