Radiation force balance for diagnostic and therapeutic medical ultrasound ultrasonic. Power is a primary acoustic quantity and its measurement is required by international standards for both diagnostic and therapeutic ultrasound systems. The ability to measure ultrasonic power accurately is vital to ensuring the correct operation and safe use of ultrasound in medicine.

A Radiation Force Balance (RFB) provides a means to directly measure the power produced by a source of ultrasound. It accomplishes this by means of a highly accurate micro-balance that is used to determine the acoustic radiation force that occurs when ultrasound is incident upon a highly absorbing target. The RFB from Precision Acoustics Ltd can be used to measure ultrasonic power from 10 mW to 100 W over a wide range of frequencies