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高强度聚焦超声(high intensity focused ultrasound,HIFU)热疗是一种新兴的治疗肿瘤的微创技术。自20世纪90年代以来,此项技术有了极大地发展,在声场、热场、超声和组织作用机制等方面有了进一步的研究。高强度聚焦超声具有指向性好、聚焦性高、组织穿透性强、可体外聚焦等优点。超声发射源在定位系统引导下,在体外通过定向聚焦把焦点对准肿瘤部位,准确地破坏深部肿瘤组织而不损伤聚焦区域外的正常组织,从而达到不开刀切除肿瘤的目的,被称为“隐形超声刀”。其热效应能在焦点瞬间产生70～100℃的高温。
High intensity focused ultrasound (HIFU) hyperthermia is a new minimally invasive technique for the treatment of tumors. This technique has been greatly developed since the 1990s and has been further studied in the fields of sound field, thermal field, ultrasound and tissue mechanics. High-intensity focused ultrasound with a good directivity, high focusing, strong tissue penetration, in vitro focus and so on. Under the guidance of the positioning system, the ultrasound emanating source directs the focus to the tumor site through directional focusing in vitro, accurately destroying the deep tumor tissue without damaging the normal tissue outside the focusing area, so as to achieve the purpose of not cutting off the tumor and being called “ Invisible ultrasonic knife. ” Its thermal effect can instantly produce 70 ~ 100 ℃ in the focus of high temperature.