Parallel Computing of Patch-Based Nonlocal Operator and Its Application in Compressed Sensing MRI

Table 1

Computation time of PANO-based CS-MRI (unit: seconds).

	Sliding step = 8		Sliding step = 4
	One core	Four cores	One core	Four cores
Learning similarities	0.077	0.039	0.578	0.153
3D wavelet transform on cubes	7.910	2.438	31.684	8.915
Other computations	0.531	0.546	0.560	0.575
Total reconstruction time	8.518	3.023	32.822	9.643