Ultrasound is a type of mechanical energy characterized by vibrating or moving particles within a medium.
 Properties of ultrasound energy traveling through biological tissues has been extensively studied in recent years.
 Higher frequency ultrasound waves generally produce higher resolution images.
 It also increases as frequency increases which restricts imaging depth.

 Some of the more common ultrasound tests include A-scans, M-scans, B-scans, and Doppler techniques.
Another characteristic of ultrasound is gaining an ultrasound signal because of conversion of mechanical wave energy to thermal energy.
Doctors have made medical applications to harness this heat conversion and use it in successful medical procedures.
 Ultrasound energy is also used in anticancer treatment