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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: J Magn Reson Imaging. 2013 Oct 10;39(6):1401–1410. doi: 10.1002/jmri.24320

Figure 1.

Figure 1

The reference fat signal measured in subcutaneous adipose tissue of a 57 year old woman and used in the fitting procedure to generate maps of fat, water and R2*. The upper graph (a) shows the magnitude of the signal as a function of echo time (TE), acquired using the multiple gradient echo (MGRE) sequence. The lower graph (b) displays the corresponding spectrum as a function of frequency shift from the water resonance. The spectrum was calculated from the complex-valued MGRE signal by performing a Fourier transform over the echo dimension. Data from several adjacent voxels were combined to improve the signal to noise ratio (SNR), but no apodization was applied. The vertical axes of both graphs are plotted in arbitrary units.