An analytic derivation for the transient temperature rise during an ultrasound pulse focused on bone.
An analytic derivation is given for the maximum transient temperature rise due to millisecond ultrasound (US) pulses focused on bone. The temperature rise is found to have, within a small correction factor, a square-root dependence on the pulse duration and is independent of the focal diameter. The equation developed is essentially the same as that found in a previous paper that obtained the formula by numerical methods and subsequent curve fitting.
Herman
Bruce A
BA
Center for Devices and Radiological Health, Food and Drug Administration, Rockville, MD 20850, USA. bah@cdrh.fda.gov
Myers
Matthew R
MR
D000465:Algorithms; D001831:Body Temperature; D001842:Bone and Bones / Q000000981:diagnostic imaging* / Q000502:physiology; D006358:Hot Temperature; D006801:Humans; D008954:Models, Biological; D013814:Thermal Conductivity; D013997:Time Factors; D014463:Ultrasonography / Q000379:methods