Research Article

Real-Time Compressive Sensing MRI Reconstruction Using GPU Computing and Split Bregman Methods

Table 2

Single-precision GPU CS MRI reconstruction times for test images ranging from 162 to 81922 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

160.0110.0110.0600.18
320.0160.0170.0600.28
640.0380.0460.0630.73
1280.130.0990.0611.62
2560.490.280.0664.24
5122.01.10.129.17
10248.43.40.3410.00
204835141.310.77
4096160688.38.19
81926702701401.93