ASL difference signal (ΔM, control − label images), CBF, and CBF changes before, after 15 minutes 100% oxygen inhalation, and 15 minutes following resumption of room air breathing in 7 healthy young subjects
| Room Air Baseline (before) | 100% Oxygen (during) | Room Air (after) | ||
|---|---|---|---|---|
| T1a | Blood | 1230 ms | 1050 ms | 1230 ms |
| ΔM change (% from baseline) | Global | – | −23 ± 11* | 1 ± 17 |
| Gray | – | −21 ± 11* | 2 ± 15 | |
| White | – | −28 ± 19† | −3 ± 35 | |
| CBF (ml/100 g/min) | Global | 50 ± 10 | 47 ± 10 | 50 ± 9 |
| Gray | 62 ± 11 | 60 ± 13 | 63 ± 9 | |
| White | 30 ± 9 | 25 ± 3 | 29 ± 7 | |
| CBF change (% from baseline) | Global | – | −5 ± 14 | 0 ± 17 |
| Gray | – | −2 ± 14 | 1 ± 15 | |
| White | – | −12 ± 23 | −3 ± 39 |
Note:— –, indicates data not available.
* P < .01.
† P < .05. All values are mean ± SD. The SDs are across subjects.