摘要
计算了凹球面自聚焦超声源和聚焦高斯超声源在生物媒质中产生的声场及温度场,并对其主要特征进行了分析。比较了不同条件下此两种聚焦超声源用于热疗时的有效治疗区及声焦点处的升温快慢,揭示了它们对生物组织加热作用的差异,证实最大温升主要取决于最大声吸收率。
The sound fields and temperature fields in biological medium generated by concave spherical ultrasound source and focused gaussian ultrasound source were calculated, and their characteristics were analyzed. While these two kinds of focused ultrasound sources were used for hyperthermia, their effective treatment areas and their transient temperatures at the acoustic focus were compared under various conditions. The results indicate the thermal effects induced by them are different, and the maximum temperature elevations mainly depend on maximum sound absorption rate.
出处
《激光生物学报》
CAS
CSCD
2003年第6期401-405,共5页
Acta Laser Biology Sinica
基金
湖南省自然科学基金资助项目(02JJY2059)
湖南省教育厅资助科研项目(02C201)。
关键词
聚焦超声
热疗
生物组织
声场
温度场
focused ultrasound
hyperthermia
biological tissue
sound field
temperature field
