Skip to main content

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

From: Combined measurement of perfusion, venous oxygen saturation, and skeletal muscle T2* during reactive hyperemia in the leg

  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)
SvO 2 (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)
T 2 * (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)
  1. No statistically significant differences were detected in any measured parameter.