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Table 7 Scanner comparison: absolute and relative error and correlation coefficient, evaluated with SW-A

From: Repeatability and reproducibility of various 4D Flow MRI postprocessing software programs in a multi-software and multi-vendor cross-over comparison study

 

Stroke volume

Forward stroke volume

Backward stroke volume

Absolute error

2 ± 12 ml

2 ± 11 ml

 − 1 ± 1 ml

Relative error [%]

0 ± 15

1 ± 13

38 ± 120

ICC

0.862**

0.874**

0.337

 

Peak flow

Peak maximum velocity

Peak average velocity

Absolute error

22 ± 60 ml/s

9 ± 21 cm/s

7 ± 15 cm/s

Relative error [%]

3 ± 16

8 ± 17

11 ± 22

ICC

0.832**

0.474

0.491

 

Area

Peak WSS per segment

Peak WSS per contour

Absolute error

 − 49 ± 137 mm2

144 ± 239 mPa

110 ± 179 mPa

Relative error [%]

 − 8 ± 20

11 ± 17

10 ± 16

ICC

0.828**

0.659*

0.764**

  1. Absolute error = MRI1–MRI2. Relative error = absolute error / 0.5* (MRI1 + MRI2). Absolute and relative errors are given as mean ± standard deviation. Asterisks indicate ***excellent, **good, and *moderate intraclass correlation (ICC). No asterisk indicates poor agreement
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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