Butterfly Network iQ - Page 59

The Simpson's Ejection Fraction tool allows you to estimate left ventricular Ejection Fractions (EF) when capturing
cardiac studies from an apical four chamber view of the heart. Butterfly iQ uses the Simpson’s Monoplane
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method
to calculate the ejection fraction.
Using the Automatic Ejection Fraction Tool
1. Select the Cardiac preset.
2. Select the Actions button on the bottom of your screen.
3. Under tools, select Simpson's EF.
4. The Record an Apical 4 Chamber screen is displayed with an Educational View Guide at the bottom of the
screen. The guide uses a scale from red to green
, with green indicating a high quality image. Position
the probe to acquire a high quality apical 4 chamber view of the heart.
5. Select Calculate and hold the probe steady. A 3-second clip is automatically recorded.
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Lang et al., J. Am. Soc.Echocardiography, 2005: 1440-63. Estimates of the base points of the mitral valve `points` are used to define the
midpoint of the mitral valve and the apex point (furthest point on segmentation mask from midpoint). These two points define an axis about which
we perform disk integration. As per convention, 20 disks should be used.
Automatically Estimating Ejection Fractions
AI-Assisted Tools 59