Ultrasound Basics

The image as a plane

sensor position


A key thing to understand about basic US (and in general this is still high-end ultrasound) is that the image is a plane. While there are things like three dimensional and even four-dimensional US, it’s difficult to display it on a flat screen, so typically most US and echo is still done using two-dimensional imaging which is basically where the scan lines are arranged in a plane and they cut through the body depending on where you direct that plane. It’s what makes US so powerful in terms of where it can go, and also does make it challenging to know exactly where you’re oriented and we’ll talk about orientation a bit.

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