Skip to main content

Table 2 Results from PC-MRI-measured flow rate with different acquisition parameters

From: Effect of MRI acquisition parameters on accuracy and precision of phase-contrast measurements in a small-lumen vessel phantom

Protocol

Flow rate

(mean and range, mL/s)

SD

CoV (%)

LDD (mL/s)

Voxel (mm3)

NSA

VENC (mL/s)

2.5

1

200

7.30 (7.05–7.61)

0.16

2

0.32 (4%)

5.0

1

200

8.74 (8.67–8.83)

0.05

1

0.10 (1%)

7.5

1

200

9.49 (9.20–9.59)

0.12

1

0.24 (3%)

2.5

2

200

7.54 (7.36–7.71)

0.12

2

0.23 (3%)

2.5

3

200

7.73 (7.58–7.90)

0.09

1

0.18 (2%)

2.5

1

300

7.38 (7.08–7.70)

0.21

3

0.41 (5%)

2.5

1

400

7.38 (7.04–7.52)

0.14

2

0.28 (4%)

5.0

3

200

8.41 (8.33–8.50)

0.07

1

0.13 (2%)

7.5

3

200

9.48 (9.33–9.58)

0.08

1

0.15 (2%)

Reference standard

6.59 (6.50–6–70)

0.08

1

0.15 (2%)

  1. CoV Coefficient of variation, LDD Least detectable difference, in both absolute and in relative values (given as % of the mean), NSA Number of signal averages, PC-MRI Phase-contrast magnetic resonance imaging, SD Standard deviation, VENC Velocity encoding