Table 1.
The time to peak (seconds) of the region-of-interest averaged responses for each of the five hemodynamic parameters measured for each of the five subjects used in each study
| Subject # | Time to peak (s) | ||||
|---|---|---|---|---|---|
| HbO | HbT | HbR | BOLD | ASL | |
| Study I | |||||
| A | 5.5 | 5.4 | 5.5 | 6.5 | - |
| B* | 2.9 | 2.8 | 5.7 | 6 | - |
| C | 3.8 | 3.7 | 5.3 | 6 | - |
| D | 7.1 | 7.1 | 8.2 | 7.5 | - |
| E | 3.5 | 3.5 | 5.3 | 5.5 | - |
| Group average | 4.6 (1.7) | 4.5 (1.7) | 6.0 (1.2) | 6.3 (0.8) | - |
| Study II | |||||
| F* | 2.8 | 2.6 | 6.4 | 5.5 | 3.5 |
| G | 4.2 | 4.2 | 6.2 | 6 | 4 |
| H | 3.9 | 3.9 | 6 | 6 | 2.5 |
| I | 4.2 | 3.6 | 6.2 | 6.4 | 4 |
| J | 2 | 2 | 4.7 | 4 | 3 |
| Group average | 3.4 (1.0) | 3.3 (0.9) | 5.9 (0.7) | 5.6 (0.9) | 3.4 (0.7) |
| Average of both | 4.0 (1.4) | 3.9 (1.5) | 6.0 (1.0) | 5.9 (0.9) | 3.4 (0.7) |
Time-to-peak values were calculated as the time to maximum (or minimum in the case of HbR) response from the presentation of the stimulus. The average shows the mean with the standard deviation in parentheses. The temporal resolution for BOLD and ASL responses were ±500 ms and was ±100 ms for the HbO, HbT, and HbR (NIRS) measurements. Subjects B and F were the same subject repeated in both studies.