Table 1:
Reconstruction time analysis of MS-ResNet and Gadgetron nonlinear conjugate gradient (NLCG) algorithm. Non-uniform Fast Fourier transform (NUFFT) is the major computation for non-Cartesian k-space data reconstruction using NLCG. Oversampling ratio is a critical factor of NUFFT that can be used to trade accuracy for computational time reductions as shown in the table.
| Time (ms/slice) | |||||
|---|---|---|---|---|---|
| Data | Dimensionsa | Gadgetron NLCG | MS-ResNet | ||
| os = 1.2 | os = 2.0 | os = 1.2 | os = 2.0 | ||
| T2 knee | 320,512,15,8 | 6601.4 | 9212.5 | 82.3 | 95.3 |
| T2 brain | 320,256,16,16 | 9697.2 | 14438.3 | 102.2 | 125.7 |
| T1 brain | 320,512,16,32 | 18740.0 | 25914.0 | 158.8 | 194.3 |
| T1 abdomen | 384,512,20,32 | 29181.8 | 73756.3 | 265.7 | 486.4 |
a
From left to right, the values denote number of readout points, number of total radial lines, number of coils, and number of contrasts.