The coupling gasket can reduce the reflection and scattering of ultrasound waves between the gasket and the skin, thereby improving imaging quality, and can prevent direct contact between the sensor and the skin, reduce sensor wear and risk of contamination, and help reduce patient discomfort,and improve cooperation in ultrasound examinations.On the other hand,gaskets avoid the risk of cross-contamination. Using a new pad for each patient reduces the possibility of infectious disease transmission.