Figure 6.

Example of brain MRE performed on a 47-year-old healthy male volunteer. (a) Proton-density-weighted, T2-weighted, and T1-weighted anatomical MR images. (b) Wave images and elastograms for data corresponding to several frequencies of mechanical vibration ranging from 25 Hz (top row) to 62.5 Hz (bottom row). The first two columns show the real and imaginary parts of the wave data obtained at each frequency, and the last two columns show the real and imaginary parts of the reconstructed shear moduli at each frequency. (From Sack I, Beierbach B, Wuerfel J, et al. The impact of aging and gender on brain viscoelasticity. Neuroimage 2009;46(3):652–657, adapted with permission.)