Table 3.

Benchmarking results of the FE and FD simulators on a representative case of a cancerous prostate model. Cryoprobe layout is based on a bubble packing method (illustrate d in Fig. 4). For the FE simulator, a time step of the 60 sec represents an upper limit for convergence, whereas the 30 sec time step is deemed practical for concurrent defect region calculations. Time step for the FD simulator is taken at the stability li mit.

Simulator	FE		FD
Time step		60 sec	30 sec	.02 sec
Minimum defect value		24.5%	24.7%	24.3%
Total simulated time		255 sec	255 sec	255 sec
Simulated time to minimum defect		180 sec	199 sec	255 sec
Actual runtime	1 core	613 sec	966 sec	144 sec
	2 cores	423 sec	689 sec	83 sec
	4 cores	304 sec	521 sec	67 sec
Simulated time ratio = comp. runtime / procedure duration	1 core	236%	379%	56%
	2 cores	165%	270%	32%
	4 cores	119%	204%	26%