Acoustic dose and acoustic dose-rate.
Acoustic dose is defined as the energy deposited by absorption of an acoustic wave per unit mass of the medium supporting the wave. Expressions for acoustic dose and acoustic dose-rate are given for plane-wave conditions, including temporal and frequency dependencies of energy deposition. The relationship between the acoustic dose-rate and the resulting temperature increase is explored, as is the relationship between acoustic dose-rate and radiation force. Energy transfer from the wave to the medium by means of acoustic cavitation is considered, and an approach is proposed in principle that could allow cavitation to be included within the proposed definitions of acoustic dose and acoustic dose-rate.
Duck
Francis
F
Medical Physics and Bioengineering Department, Royal United Hospital, Bath and University of Bath, Bath, United Kingdom. f.duck@bath.ac.uk
D000162:Acoustics; D004735:Energy Transfer; D006801:Humans; D045423:Microbubbles; D008954:Models, Biological; D013314:Stress, Mechanical; D014464:Ultrasonic Therapy / Q000379:methods*