Determining the conditions for measurement of spatial-peak temporal-averaged intensity in scanned ultrasound beams.
This paper describes a new three stage approach which simplifies the process of measurement of spatial-peak temporal-averaged intensity for scanned ultrasound beams. Firstly, the conditions delivering the maximum total acoustic power are determined. Secondly, out-of-plane beam-widths are measured which, together with knowledge of the in-plane scan widths, are used to locate the depth at which the scanned area is at a minimum. Finally, the spatial-peak temporal-average intensity is measured using the conditions and depth identified in the first two stages. Experimental results justify the use of this new procedure.
Dixon
K L
KL
Medical Physics Department, Royal United Hospital, Bath, UK.
Duck
F A
FA
D000162:Acoustics; D008962:Models, Theoretical; D014463:Ultrasonography