Table 4. Mean runtimes and speedups for registration of images from the 5 datasets of the original ANTs and the accelerated ANTs with Workstation 2. (Time: seconds).

Dataset time (s)	1	2	3	4	5
Dimensions (Width*Height*Depth)	131×179×137	162×215×157	176×192×192	256×124×256	256×256×128
Size (voxels)	3212513	5468310	6488064	8126464	8088608
Time for CC in Original ANTs	591.31	966.86	1126.05	1742.72	1982.59
Total time for Original ANTs	996.81	1616.6	1838.79	2627.15	3039.34
Percent of time for CC	59%	60%	61%	66%	62%
Time for CC in Accelerated ANTs	39.37	60.83	72.76	109.88	107.26
Total time for Accelerated ANTs	443.37	676.57	781.64	1011.11	1108.66
Speedup of CC	15.02	15.9	15.48	15.86	18.48
Total Speedup	2.25	2.38	2.35	2.6	2.74