Table 2.
Image quality scores (average value ± standard deviation, on 1–4 scales) in terms of vessel delineation, artifacts and noise of 3 different reconstruction methods at acceleration rates 4X, 8X and 12X using retrospectively under-sampled data from 6 healthy volunteers.
| Vessel Delineation | |||
|---|---|---|---|
| K-space Sub. CS | Independent CS | Mag. Sub. CS | |
| 4X | 3.1 ± 0.5 (*) | 3.2 ± 0.5 (*) | 3.8 ± 0.4 |
| 8X | 2.5 ± 0.6 | 2.7 ± 0.4 | 2.8 ± 0.4 |
| 12X | 2.0 ± 0.4 | 2.1 ± 0.5 | 2.3 ± 0.6 |
| Artifacts | |||
|---|---|---|---|
| K-space Sub. CS | Independent CS | Mag. Sub. CS | |
| 4X | 3.0 ± 0.4 | 3.1 ± 0.5 | 3.5 ± 0.6 |
| 8X | 2.7 ± 0.5 | 2.8 ± 0.6 | 3.0 ± 0.6 |
| 12X | 2.3 ± 0.7 | 2.5 ± 0.7 | 2.6 ± 0.7 |
| Noise | |||
|---|---|---|---|
| K-space Sub. CS | Independent CS | Mag. Sub. CS | |
| 4X | 2.5 ± 0.7 (*) | 2.8 ± 0.5 (*) | 3.6 ± 0.6 |
| 8X | 2.0 ± 0.7 (*) | 2.3 ± 0.6 | 2.6 ± 0.7 |
| 12X | 1.7 ± 0.6 (*) | 2.0 ± 0.6 | 2.2 ± 0.8 |
*
denotes statistical significance (p<0.05) when compared with the proposed magnitude subtraction CS technique at the same acceleration rate.