Table 1.
Means and standard deviations (in parentheses) of key time-course metrics measured with PIVOT and standard measurement methods in five young healthy subjects on two separate occasions
| |
Visit 1 |
Visit 2 |
||||
|---|---|---|---|---|---|---|
| PIVOT | PIVOT Repeat | Standard Method | PIVOT | PIVOT Repeat | Standard Method | |
|
Perfusion (Standard Method = PASL) | ||||||
| PHF (mL/min/100g) |
34.8 (7.5) |
34.5 (10.2) |
37.9 (9.0) |
39.2 (4.1) |
38.3 (6.0) |
37.6 (5.6) |
| TTP (s) |
19.6 (3.6) |
18.0 (3.5) |
17.2 (2.3) |
18.4 (5.7) |
17.2 (4.1) |
17.6 (5.2) |
| HFV (mL/100g) |
17.0 (5.3) |
14.0 (5.0) |
16.2 (5.6) |
16.7 (5.4) |
14.4 (1.9) |
16.1 (2.3) |
| Hyperemic duration (s) |
53.6 (15.7) |
46.8 (13.8) |
53.6 (10.4) |
48.8 (14.9) |
44.8 (10.3) |
49.6 (14.2) |
|
SvO2 (Standard Method = multi-echo GRE) | ||||||
| Washout time (s) |
11.6 (2.2) |
10.0 (2.0) |
10.4 (1.7) |
12.4 (3.6) |
11.2 (4.8) |
10.0 (1.4) |
| Upslope (%HbO2/s) |
0.83 (0.32) |
1.08 (0.47) |
1.21 (0.54) |
1.14 (0.42) |
0.91 (0.43) |
1.13 (0.48) |
| Overshoot (%HbO2) |
17.6 (7.5) |
17.1 (6.1) |
16.8 (7.1) |
18.6 (6.5) |
16.5 (7.6) |
18.3 (5.0) |
|
T2* (Standard Method = multi-echo GRE) | ||||||
| Baseline T2* (ms) |
23.4 (1.4) |
22.5 (1.5) |
23.1 (2.0) |
22.0 (1.9) |
21.7 (1.6) |
22.2 (2.0) |
| Relative T2*min |
0.90 (0.04) |
0.93 (0.03) |
0.92 (0.01) |
0.92 (0.03) |
0.93 (0.04) |
0.94 (0.02) |
| Relative T2*max |
1.09 (0.03) |
1.13 (0.04) |
1.16 (0.05) |
1.14 (0.05) |
1.15 (0.05) |
1.18 (0.05) |
| TTPT2* (s) | 34.0 (11.6) | 29.2 (3.6) | 26.8 (5.2) | 28.4 (3.6) | 24.8 (5.0) | 28.4 (4.8) |
No statistically significant differences were detected in any measured parameter.