When the disease occurs in the animal, the disease suspected to be the spleen can be examined by ultrasound machines and the size of the spleen can be measured to compare it with the normal condition whether the echo is enhanced or weakened, increased or decreased.According to these,people can discover some diseases, such as septicemia or toxemia, can cause acute congestion of the spleen and enlargement of the spleen.Splenic cyst, hematoma, abscess, tumor, focal necrosis and infarction can be diagnosed if the spleen has focal echo abnormality.The echo of these diseases increases or weakens.Splenic hematoma or free ascites can be seen in the ultrasonic image of splenic rupture.