Trapezoidal imaging feature can be access when using Linear Scanners (L7, L15 and L20). The Trapezoidal imaging extends the field of view by creating an image base wider than the footprint of the transducer, which allows to include more posterior and lateral tissue.
How to enable:
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Enable Advanced Imaging controls in the Settings Page
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In the Scan page, tap the Imaging Mode & Tools Menu
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Tap the the Trapezoidal imaging icon
to enable
Note: The imaging field of view will be changed while in Trapezoidal imaging.