【摘要】 高强度聚焦超声用于肿瘤热疗是一种无损、有效的新型肿瘤治疗手段,正日益得到广泛的应用,而超声换能器的聚焦性能直接影响到治疗的效果。本文从理论上分别讨论了声透镜聚焦和凹球面自聚焦两种常用的聚焦方式的原理及特点,并结合实际应用比较了两者在高强度聚焦超声热疗中的优缺点,最后得出结论:凹球面镜自聚焦比声透镜聚焦更适于HIFU对肿瘤的治疗。更多还原

【Abstract】 As a safe and effective method for tumor heat treatment,high-intensity focusing ultrasound(HIFU)will be applied more and more widely.The focusing performance of the ultrasonic transducer can affect the curing effect directly.In this paper,the principles and characteristics of two usual focusing methods,by its concave sphere or by the sound lens,are discussed in theory.The advantages and disadvantages of their applications to tumor heat treat-ment compared,the method by its concave sphere is more effective than the other.更多还原