Table 1 Radius and flow volume measurements obtained with PC-MR and TOF-MRA in tubal experiments.

From: Arterial flow volume measurement using signal intensity gradient versus phase contrast

 

Tubal radius (known), mm

2.0

3.25

4.0

5.5

Radius, measured

   PC-MR

1.80 ± 0.08*

3.09 ± 0.11*

3.75 ± 0.11*

5.19 ± 0.08*

   TOF-MRA

1.81 ± 0.18*

3.10 ± 0.09*

3.78 ± 0.08*

5.17 ± 0.30*

Flow, calculated

   PC-MR, ml/s

0.65 ± 0.40

1.88 ± 1.05

2.79 ± 1.69

5.15 ± 3.30†

   TOF-MRA by Fig. 1c, SIG·cm3

0.19 ± 0.07‡

0.72 ± 0.33‡

1.35 ± 0.58‡

3.15 ± 1.56†‡

   TOF-MRA by Fig. 1d, SIG·cm3

0.18 ± 0.08‡

0.68 ± 0.35‡

1.14 ± 0.59‡

2.26 ± 1.27†‡

  1. Mean ± standard deviation (SD) presented. PC-MR, phase-contrast magnetic resonance; TOF-MRA, time-of-flight magnetic resonance angiography.
  2. * P < 0.001 by paired t-test (for known tubal radius values).
  3. † P < 0.001 by analysis of variance (ANOVA).
  4. ‡ P < 0.001 by t-test (for flow volume by PC-MR).
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