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In vivo 31P spectra of visual cortex acquired at (a) 4 T (TR=6s, NT=192) and (b) 7 T (TR=16s, NT=128) from human brains, and at (c) 9.4 T (TR=16s, NT=64) and (d) 16.4 T (TR=5s, NT=40) from cat brains and processed without any line broadening (LB=0). PE: phosphoethanolamine; PC: phosphocholine; GPE: glycerophosphoethanolamine; GPC: glycerophosphocholine; NAD+ & NADH: oxidized and reduced forms of nicotinamide adenine dinucleotide.
