The new type focused ultrasound transducers

The use of HIFU piezo ceramic to treat local tumors, how to enhance the treatment effect and minimize the radiation damage to healthy areas is an important issue. In response to this problem, many researchers have designed and developed some new transducers. Some researchers have proposed to use multiple transducers to perform radiation treatment in such a way that the normal irradiation time of the normal tissue will be shortened, and the way of this rotation work is also beneficial to the heat dissipation and self-repair of normal tissues. Other researchers have proposed introducing a new HIFU transducer with dual-frequency operation mode and single-frequency operation mode, and irradiating isolated pig liver tissue in two modes. The experimental results show that under the same irradiation conditions, the damage caused by the dual-frequency mode HIFU ceramics transducer is significantly larger than that of the single-frequency mode. Due to the absorption and reflection of sound beams by gas and bone, focused ultrasound is limited to the sites containing the above two types of media. For this problem, researchers have proposed using a segmented emission transducer. When the tumor is located behind the ribs and close to the ribs, damage to the ribs and damage to other tissues can be avoided by closing the corresponding transducer sheets. Fundamentally, we expect that the treatment and imaging functions are not dependent on mechanical motion.