Sat27November0445PM 27

Which is true of the physics of ultrasound?

(Please select 1 option)

The velocity is independent of the temperature of the material through which it travels

The A mode is used to judge the depth of an organ, or otherwise assess an organ's dimensions. This is the correct answer

Acoustic enhancement occurs with solid structures

The sound travels well through air

Ultrasound waves pass more slowly through denser materials Incorrect answer selected

Explanation

The velocity of the ultrasound is dependent on the compressibility of the medium through which it travels and the density.

The greater the compressibility the slower the velocity.

Compressibility is affected by temperature and hence this too will affect velocity of ultrasound.