Ultrasonography, or ultrasound, is a diagnostic method that takes advantage of the echoes produced by high frequency sound (not audible) to see in real time the reflections produced by the organism’s structures and organs. 
Veterinary ultrasound devices in general use varying frequencies depending on the type of transducer and purpose of the veterinary examination, from 5 to 14 Mhz, emitting through a piezoelectric crystal source that is in contact with the skin, after shearing, receiving the generated echoes, which are interpreted through computer graphics.