上海交通大学学报(英文版)
上海交通大學學報(英文版)
상해교통대학학보(영문판)
JOURNAL OF SHANGHAL JIAOTONG UNIVERSITY
2002年
1期
115-118
,共4页
spatial peak%temporal average%pulse average%intensity estimation%high intensity focused ultrasound
A new estimation method of maximum intensity, such as Ispta in CW and Isppa in PW, in high intensity focused ultrasound (HIFU) field for surgery was developed based on the measurements of acousic power and radical distribution of the relative acoustic pressure in the focal plane of the field. The acoustic power is measured by the radiation force balance or by the calorimetry. Using a miniature hydrophone to scan along several radial directions with the same angle intervals through the acoustic axis in the focal plane, several radial relative pressure distribution curves can be measured and thus the special cross-section area related to the maximum intensity and be calculated. The quotient of the measured acousitc power to the special cross-section area is the maximum acoustic intensity in the field. finally as an example, the acoustic field distribution of a CW system was measured and the maximum acoustic intensity estimated was given.
