Why is gel used in ultrasound imaging?

Gel is used in ultrasound imaging to improve the transmission of sound waves into the body.

Ultrasound imaging is a non-invasive medical imaging technique that uses high-frequency sound waves to create images of internal organs and tissues. The sound waves are transmitted into the body through a handheld device called a transducer. However, sound waves do not travel well through air, which is why gel is used to improve the transmission of sound waves from the transducer into the body.

The gel acts as a coupling agent between the transducer and the skin, allowing the sound waves to pass through the gel and into the body without being reflected or absorbed by the air. The gel also helps to eliminate any air pockets that may be present between the transducer and the skin, which can cause distortion or interference in the ultrasound image.

In addition to improving the transmission of sound waves, the gel also helps to reduce friction between the transducer and the skin, making it easier to move the transducer over the area being imaged. This is particularly important for imaging larger areas or for prolonged imaging sessions, as it helps to prevent discomfort or irritation to the patient's skin.

Overall, the use of gel in ultrasound imaging is essential for producing clear and accurate images of internal organs and tissues, while also ensuring patient comfort and safety.