When your pet is feeling ill, there are many different tests we use to help determine what is going on. Abdominal ultrasounds are a particularly handy tool because unlike traditional radiographs (X-rays) they use sound waves create an image of the internal organs and the surrounding areas. GI obstructions, bladder stones, masses or nodules. and organ abnormalities are some of the things an abdominal ultrasound can show. While ultrasounds are handy in diagnosing illness, they can also be done routinely for early detection.