Indeed. To say nothing of gating acquisitions to breathing, head motion, eye cicadas, glymphatic flow, etc. The highest resolution MR images I have (yet) obtai

Indeed. To say nothing of gating acquisitions to breathing, head motion, eye cicadas, glymphatic flow, etc. The highest resolution MR images I have (yet) obtained were ~20 µm^3 voxels on ex vivo (human) tissue samples fixed in agar with Gd3+ as a dopant, scanned at 12 T on a preclinical scanner. The coupled vibration of the gradient set causing blurring in the image domain at the extremities of the FOV was the limiting factor. I recall I did a partial Fourier acquisition – as ultimately we were limited by both T2* and vibration – and ended up trying to do POCS on a 4096^3 dataset and just needing tons and tons of ram to do it over something useful, like a weekend. Happy memories.