Heating due to Medical Ultrasound

My project involved the parallel modelling and experimental confirmation in tissue mimics of heating due to medical ultrasound, in particular in diagnostic systems. The increasing intensities of such systems mean that ultrasound is liable to experience nonlinear effects while it propagates through the body, which may increase or decrease the physical effect of the beam, and it is important that we learn to characterise such effects in order that safety limits can properly be set.

I've prepared a page to illustrate these effects for two simple, unfocused beams. These results were published in the Journal of the Acoustical Society of America, Volume 102.

						Mark Cahill.