耦合剂的最优化一直是人们所关心的问题。有的文献记载,以选用接近人体组织声阻的物质为最优耦合剂;也有文献记载,声阻应介于声头物质与皮肤组织之间为宜。声阻究竟选前者好?还是后者?倘若是后者,声阻又当满足什么条件,选何值为最佳?还有,在超声治疗中习惯上均采用液体石蜡等,是否是最佳的耦合剂?本文就这些问题,在理论上作进一步的研究。 Optimization of the coupling agent has always been a matter of concern. Some literature records to choose close to the body tissue impedance of the material as the best coupling agent; also documented, acoustic impedance should be between the head of the material and the skin tissue is appropriate. Is the acoustic impedance the best? Or the latter? If the latter, the acoustic impedance and when to meet what conditions, what is the best value? Also, the use of liquid paraffin ultrasonic therapy are customary, is the best Coupling agent? In this paper, these issues in theory for further research.