GRE GRAPPA reference lines limits / reconstruction failure on VE11

[vkemper]

Hi,
we have encountered a reconstruction error with the attempt of acquiring GRE GRAPPA reference lines in a multi-banded diffusion protocol on our recently updated VE11 Prisma. Specifically, with MB=2, R=2, matrix 104x104 and 72 slices, the reconstruction would fail with 54 or more reference lines in GRE acquisition mode. It works with fewer reference lines in GRE mode or with more lines in segmented mode. My guess would be that this is rather a matter of restricting the available number of reference lines in the GUI than a reco problem, as it isnt intended to do more than (PElines divided by R) reference lines in GRE mode. Addressing this minor issue might save some users a bit of troubleshooting time in the future.
all the best,
valentin