Table 2.
Quality of in vivo bSSFP reconstructions in the brain assessed via PSNR, SSIM and NMSE. Measurements were averaged across cross-sections within each subject, and reported as mean ± std across subjects. Bold font marks the top performing reconstructions apart from the brute-force methods (marked in italic font).
| PSNR (dB) | ||||||
|---|---|---|---|---|---|---|
| Acceleration | A-ESPIRiT | A-LORAKS | BF-LORAKS | PESCaT | A-LORAKS-CS | BF-LORAKS-CS |
| R = 2 | 29.70 ± 1.17 | 37.31 ± 0.47 | 37.31 ± 0.49 | 34.49 ± 0.38 | 37.15 ± 0.52 | 39.20 ± 0.35 |
| R = 3 | 24.29 ± 0.67 | 32.53 ± 0.47 | 32.57 ± 0.49 | 30.54 ± 0.35 | 33.40 ± 0.57 | 35.17 ± 0.46 |
| R = 4 | 22.10 ± 2.08 | 30.61 ± 0.52 | 30.83 ± 0.44 | 28.78 ± 0.32 | 31.46 ± 0.55 | 33.12 ± 0.39 |
| SSIM (%) | ||||||
|---|---|---|---|---|---|---|
| Acceleration | A-ESPIRiT | A-LORAKS | BF-LORAKS | PESCaT | A-LORAKS-CS | BF-LORAKS-CS |
| R = 2 | 81.57 ± 4.04 | 94.84 ± 0.68 | 94.86 ± 0.68 | 94.29 ± 0.62 | 96.39 ± 0.55 | 97.37 ± 0.26 |
| R = 3 | 65.27 ± 3.51 | 87.56 ± 1.37 | 87.67 ± 1.45 | 89.08 ± 0.96 | 93.22 ± 1.03 | 94.76 ± 0.48 |
| R = 4 | 58.67 ± 7.87 | 83.85 ± 2.07 | 83.97 ± 2.06 | 85.82 ± 1.12 | 90.81 ± 1.37 | 92.73 ± 0.56 |
| NMSE (10−2) | ||||||
|---|---|---|---|---|---|---|
| Acceleration | A-ESPIRiT | A-LORAKS | BF-LORAKS | PESCaT | A-LORAKS-CS | BF-LORAKS-CS |
| R = 2 | 1.11 ± 0.36 | 0.19 ± 0.03 | 0.19 ± 0.03 | 0.36 ± 0.06 | 0.20 ± 0.04 | 0.12 ± 0.02 |
| R = 3 | 3.82 ± 0.87 | 0.56 ± 0.09 | 0.55 ± 0.09 | 0.88 ± 0.12 | 0.47 ± 0.11 | 0.31 ± 0.05 |
| R = 4 | 6.85 ± 3.39 | 0.87 ± 0.17 | 0.83 ± 0.14 | 1.32 ± 0.17 | 0.73 ± 0.16 | 0.49 ± 0.07 |