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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Magn Reson Med. 2016 Aug 31;78(2):656–663. doi: 10.1002/mrm.26383

Fig. 1.

Fig. 1

MRI signal (M) without MT saturation and MTRobs for a voxel with presence of fat, free water and macromolecules showing the effects of different values of water fraction as well as the product of echo time and field strength (TE•B0). The variations of the water fraction and TE•B0 (a) lead to changes in the MRI signal (M) (a) and MTRobsb). MTRobs for water and fat signals with phase differences ranging from in-phase to completely out of phase, across a broad range of water fraction values (c). A linear relationship of MTRobs with water fraction is shown when fat and water are in-phase (black line). The remaining parameters used in this simulation include: Ma = 1, Msatw = 0.4, chemical shift between fat and water = 3.5ppm.