Figure 3:
Magnitude of the k-space spectra calculated using the 2D-FT method. The k-space spectra have superimposed vertical lines corresponding to 80 % (dotted line) and 90 % (dashed line) of power spectra amplitude, respectively. Results were calculated for the numerical LISA viscoelastic phantoms without added noise and with a SNR = 15 dB, with assumed material properties. (top row) μ1 = 4.99 kPa and μ2 = 1 Pa·s (Phantom 1). (middle row) μ1 = 3.34 kPa and μ2 = 1.25 Pa·s (Phantom 2). (bottom row) μ1 = 1.48 kPa and μ2 = 0.75 Pa·s (Phantom 3).