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Keyword: High intensity focusing ultrasonic, Transducer, Non-invasive temperature measurement Abstract. High intensity focused ultrasound (HIFU) is the fourth brand-new and efficient means to cure tumour acknowledged by the medical field. China is regarded as one of countries applying HIFU to clinical oncotherapy earliest in the world. However, a considerable part of HIFU equipments which have been put on the market leave unused because accidental injuries such as ambustion to the body surface, tumour tissue residues in the target section or damages to normal tissues are often caused in HIFU clinical treatment. In the paper, ultrasonic focusing method, temperature measurement technique of high-intensit y focusing ultrasonic therapy is introduced; studies of current situations of cell and multiplex array focusing transducers and their existing problems are focally analyzed and illustrated based on analyzing challenges faced by HIFU treatment at present. This study suggested that phased array was theoretically easy for realizing accurate control of computer, however, unbeneficial factors and engineering technical problems still exist.

Present situation of research and Application of High Intensity Focusing Ultrasonic Therapy