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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.