Which combination of media is listed as usable for transmitting ultrasound?

Which combination of media is listed as usable for transmitting ultrasound?

• A. Gel, Lotion, and Water
• B. Gel only
• C. Water only
• D. Oil

Answer: (A)

Ultrasound energy needs a medium that fills gaps between the transducer and the skin so the sound waves don’t reflect off air and lose power. Gel is the standard coupling medium, water is used in immersion setups, and lotion can serve as an alternative when gel isn’t available. Oil, however, doesn’t transmit ultrasound well and can create poor coupling or other issues, so it isn’t used. Because gel, lotion, and water all function effectively as coupling media, that combination is the correct option.

Ultrasound energy needs a medium that fills gaps between the transducer and the skin so the sound waves don’t reflect off air and lose power. Gel is the standard coupling medium, water is used in immersion setups, and lotion can serve as an alternative when gel isn’t available. Oil, however, doesn’t transmit ultrasound well and can create poor coupling or other issues, so it isn’t used. Because gel, lotion, and water all function effectively as coupling media, that combination is the correct option.