Gastrointestinal foreign body is one of the most common diseases of the digestive system. Foreign bodies can be divided into four categories: high density, medium density, low density and fine matter.High density material is strong echo such as stone, glass ball and so on.Medium-density substances show sub-strong echo, such as rubber plug, foam, plastic and so on easy to diagnose.Low-density echo such as cotton silk, wire, plastic bags and so on need a large number of diagnosis.Fine objects such as stitches, thin wire and so on are difficult to diagnose.Gastrointestinal leiomyoma is also a common disease in dogs. It is difficult to be diagnosed by general diagnostic methods. On veterinary ultrasound equipment, it is shown as a mass, with an incorrect projectile growing on the wall of the intestine, often including a single or multiple strong echo region. It is different from gastrointestinal gas content.

Its diagnostic effect is ideal.A canine with early cataracts can be identified on ultrasound images to determine it was caused by vitreous opacity or retinal degeneration.It is a quick and easy way to identify specific sites before cataract surgery.The dog's forelimbs are prone to limp by jumping and frolicking，ultrasonic examination can be used to determine whether it is caused by muscle, fascia or shoulder joint injury, which is very necessary for accurate and timely treatment.Pleural and abdominal effusion is also a common disease in dogs. The diagnosis of pleural effusion by B-ultrasound is more direct and without injury than puncture, and is generally welcomed by livestock owners.