You’ve probably noticed that the transducers, or probes, on your ultrasound system are named or marked with a number followed by ”MHz”, most likely in the 1-20 range. Often this is how a company advertises their products – for example, a 7MHz linear rectal transducer. Perhaps you’ve wondered what this number refers to or the significance of having a higher or lower number on your probe.

If you’re new to ultrasound, an image may look like nothing more than a swirling array of grey tones on the screen.  Interpretation requires an understanding of anatomy and physiology, but also of how ultrasound technology functions.

Consider the sonar produced by a bat in flight. The bat emits high frequency sounds, which then bounce off of objects in its proximity and return to the bat. The animal uses the strength, direction, and timing of the returning sound to determine where those objects are and to avoid a collision.

Have you ever looked at an ultrasound image and wondered what are you looking at? Ever wonder which end is up? When others are discussing bull or heifer, ovarian diagnosis, or metritis treatment are you still looking to decide what it is?? Well, if you feel left in the dark when it comes to ultrasound images…..let’s start back at the basics.

Ultrasound is a non-invasive, immediate tool used to image tissue. It will not penetrate bone (like an X-Ray). So the first step to help you read the ultrasound image is to be familiar with the anatomy that you are imaging.