Number and percentage of each modality from baseline to control phasesa
| Baseline | I-Phase I | I-Phase II | I-Phase III | C-Phase I | C-Phase II | C-Phase III | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | |
| RB-MRI | 38 | 18.5 | 9 | 14.5 | 10 | 11.6 | 8 | 8.7 | 18 | 18.9 | 11 | 9.4 | 16 | 14.3 |
| UF-MRI | 37 | 18.0 | 31 | 50.0 | 49 | 57.0 | 45 | 48.9 | 42 | 44.2 | 56 | 47.9 | 54 | 48.2 |
| Head CT | 62 | 30.2 | 5 | 8.1 | 6 | 7.0 | 7 | 7.6 | 10 | 10.5 | 14 | 12.0 | 9 | 8.0 |
| Head US | 68 | 33.2 | 17 | 27.4 | 21 | 24.4 | 32 | 34.8 | 25 | 26.3 | 36 | 30.8 | 33 | 29.5 |
Note:—I-Phase indicates improvement phase; C-phase, control phase; RB-MRI, routine brain MRI.
↵a Duration of baseline was 3 months, followed by 3 months of improvement (each phase for 1 month), and 3 months of control phases (each phase for 1 month).