Table 6.

Running time of k-Wave and the proposed method for the simulation of different skull thicknesses and two different target depths.

h (mm)	Target Depth = 1.7 cm				Target Depth = 3.7 cm
	N ${}^{\mathit{a}}$	$\mathit{dx}$ ${}^{\mathit{b}}$ (mm)	${\mathit{t}}_1$ ${}^{\mathit{c}}$ (s)	${\mathit{t}}_2$ ${}^{\mathit{d}}$ (s)	N ${}^{\mathit{a}}$	$\mathit{dx}$ ${}^{\mathit{b}}$ (mm)	${\mathit{t}}_1$ ${}^{\mathit{c}}$ (s)	${\mathit{t}}_2$ ${}^{\mathit{d}}$ (s)
7	32${}^3$	1	20.21	149.18	64${}^3$	1	168.29	132.14
7.5	64${}^3$	0.5	168.88	149.83	128${}^3$	0.5	2533.10	135.21
7.25	128${}^3$	0.25	2535.67	147.26	256${}^3$	0.25	>18,000	134.63
7.1	320${}^3$	0.1	— e	146.46	640${}^3$	0.1	— e	133.16

${}^a$N: Total number of elements (applicable to k-Wave); ${}^b$ $dx$: Grid size (applicable to k-Wave); ${}^c$ $t_1$: k-Wave running time; ${}^d$ $t_2$: Our simulator running time; ^e —: Data is not available.