Table 2.

CPU time and memory usage for different iteration numbers (no.) and sizes N of the k-space data and the reconstructed phantom.

	CPU time in seconds				MByte
N\no.	1	2	5	10
2D ⊗ 1D trajectory
512	118.95	178.04	355.08	650.55	691
256	29.24	43.55	87.21	159.71	172
128	6.56	9.84	19.73	35.78	43
64	1.45	2.16	4.31	8.00	10
3D trajectory
512	11 422	17 114	34 189	62 650	1952
256	1865.9	2800.4	5603.3	10 274	1244
128	452.31	679.28	1344.9	2454.4	311
164	89.24	133.72	267.18	489.59	77