Proton NMR can distinguish between fat inside and outside muscle cells, unlike standard MRI.

“using proton nmr to measure fat inside the cell this is different from fat outside the cell so if you look at a steak and you see the marbling of fat in a steak that's fat outside the muscle cell which you don't see if you look at a steak is the fat inside the muscle cell and using nmr we can actually discern fat outside the cell versus fat inside the cell”