We introduce an easily implementable quantification method in vivo based on unsuppressed water measurement (pulse-acquire FID sequence with low flip-angle, short TE and TR and geometry identical to metabolite MRSI). Our quantification is practically independent on water relaxation times, requires only short extra measurement time and is robust enough in pathologies like tumors. We tested its results in a homogeneous phantom, healthy volunteers and tumor patients using a head resonator and an 8-channel array coil for acquisition.
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