Functional 31P Magnetic Resonance Spectroscopy allows the noninvasive observation of high-energy phosphate turnover in vivo, and might enable insight into the energy metabolism of activated brain areas. The purpose of this study was to investigate possible changes in 31P spectra of the human brain at B0 = 7T in response to repeated short-term visual stimulation. No significant changes in signal intensities and frequencies of 31P-containing brain metabolites were observed, which agrees with results from recent studies at ultra-high fields using long-term stimuli.
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