Table 3: Double-precision GPU CS MRI reconstruction times for test images ranging from 162 to 40962 with and without CPU multithreading. Effective speedup is the multicore CPU time relative to the GPU time.

SquareCPU time (s)GPUEffective
image size1 Core6 Corestime (s)speedup

160.0110.0110.0620.18
320.0170.0170.0620.27
640.0400.0460.0650.71
1280.130.100.0641.5
2560.490.280.0704.0
5122.01.20.1210
10248.43.40.3510
204835151.411
409616069155