Contrast-enhanced ultrasound

General features

There are a variety of microbubbles contrast agents. Microbubbles differ in their shell makeup, gas core makeup, and whether or not they are targeted.

Regardless of the shell or gas core composition, microbubble size is fairly uniform. They lie within a range of 1-4 micrometres in diameter. That makes them smaller than red blood cells, which allows them to flow easily through the circulation as well as the microcirculation.