Ultrasonic gastroscopy (EUS for short) is an advanced medical device that integrates ultrasound and endoscopy. It places a miniature high-frequency ultrasound probe at the front end of the endoscope, and when the endoscope enters the gastric lumen, real-time ultrasound scanning can be performed at the same time as the endoscope observes the morphology of the lumen directly in order to obtain ultrasound images of the histological characteristics of the pipe wall at all levels and the surrounding neighboring organs.