Explanation of beam width in ultrasound

Below is a short explanation of beam width, and why it’s important to bear in mind in canine pregnancy scanning.

Incidentally, it’s also a factor that sets transducers (and their associated machines!) apart from others – the narrower the beam in the elevation plane, the better, and higher end scanners will invariably have much narrower beam widths in the elevation plane than cheaper ones. Looking at the number of crystals in a transducer can give you some indication as to this (more rows means stronger focusing in the elevation direction).