Table 2. Subjective scores and SNR values in different groups.
| Participant | Image quality | Group | ||||||
|---|---|---|---|---|---|---|---|---|
| 15 min | 10 min | 8 min | 6 min | 4 min | 2 min | 1 min | ||
| Total | Subjective scores | 4.67±0.48 | 4.40±0.63 | 3.86±0.68 | 3.14±0.52 | 2.60±0.50 | 1.67±0.48 | 1.31±0.47 |
| SNR values | 11.22±2.61 | 10.06±2.32 | 9.23±2.13 | 8.61±1.93 | 7.48±1.96 | 5.53±1.08 | 4.00±0.73 | |
| AD | Subjective scores | 4.66±0.48 | 4.48±0.63 | 3.97±0.73 | 3.21±0.56 | 2.69±0.47 | 1.72±0.45 | 1.41±0.50 |
| SNR values | 11.05±2.79 | 9.84±2.44 | 8.96±2.12 | 8.38±1.85 | 7.22±1.85 | 5.43±1.12 | 4.00±0.72 | |
| HC | Subjective scores | 4.69±0.48 | 4.23±0.60 | 3.62±0.51 | 3.00±0.41 | 2.38±0.51 | 1.54±0.52 | 1.07±0.28 |
| SNR values | 11.62±2.19 | 10.54±2.02 | 9.83±2.12 | 9.12±2.10 | 8.08±2.13 | 5.75±1.01 | 3.98±0.77 | |
Data are presented as mean ± standard deviation. All P values of subjective scores and SNR values were <0.05 compared with the group 15 min. SNR, signal-to-noise ratio; AD, Alzheimer’s disease; HC, healthy control.