Journal: The Journal of the Acoustical Society of America
Article Title: Time-domain analysis of power law attenuation in space-fractional wave equations
doi: 10.1121/1.5047670
Figure Lengend Snippet: Time-domain Green's functions scaled by 4πr calculated for breast with y = 1.5, α0 = 0.086 Np/cm/MHz1.5, and c0 = 1450 m/s at (a) r = 1 nm, (b) r = 10 nm, (c) r = 100 nm, (d) r = 1 μm, (e) r = 100 μm, (f) r = 1 mm, (g) r = 1 cm, and (h) r = 10 cm with the power law (solid line), Chen–Holm (dashed line), and Treeby–Cox (dot-dashed line) wave equations. No noncausal behavior is observed at any distance in the time-domain Green's functions for the Chen–Holm and Treeby–Cox wave equations evaluated for breast, and beyond about r = 100 μm, the time-domain Green's functions for the power law wave equation and the Treeby–Cox wave equation are nearly indistinguishable.
Article Snippet: For the power law wave equation, the time-domain Green's function is calculated in Matlab with the STABLE toolbox, 19 which numerically evaluates the expression for the stable pdf in Eq. (21) .
Techniques: