A NEW ESTIMATION METHOD OF SPATIAL PEAK TEMPORAL AVERAGE INTENSITY AND SPATIAL PEAK PULSE AVERAGE INTENSITY IN HIFU FIELD

作     者：寿文德 孙俊霞 钱德初 SHOU Wen de, SUN Jun xia, QIAN De chu (Dept. of Biomedical Eng., Shanghai Jiaotong Univ., Shanghai 200030, China)

作者机构：Dept. of Biomedical Eng. Shanghai Jiaotong Univ. Shanghai 200030 China 

出 版 物：《Journal of Shanghai Jiaotong university(Science)》 (上海交通大学学报（英文版）)

年 卷 期：2002年第7卷第1期

页      面：115-118页

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 100207[医学-影像医学与核医学] 1002[医学-临床医学] 08[工学] 1010[医学-医学技术（可授医学、理学学位）] 10[医学] 

基　　金：National Natural Science Foundation ofChina (No.3 9970 2 0 9) 

主　　题：spatial peak temporal average pulse average intensity estimation high intensity focused ultrasound 

摘      要：A new estimation method of maximum intensity, such as I spta in CW and I sppa 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.