The 31P nucleus is NMR-visible and exists throughout the human body. The MRI/MRS community has principally focused on the 31P in the high-energy metabolites, which have relatively long T2s. However, using short echo time (TE) methods, it is possible to obtain signal from the short P that is present in the hydroxyapatite of the bone matrix. This article discusses how the signal from these fast-relaxing components can be observed and what we find when imaging them. It is shown that it is possi...Expand abstract
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