Vibration Acoustic Imaging and Damage Area Detection of Target Tissue Based on Dual-Frequency HIFU Transducer
As a non-invasive,influential physical therapy technology,HIFU has been used for the treatment of various benign and malig-nant physical tumors.However,HIFU clinical treatment still faces a key problem,i.e.,based on traditional ultrasonic images,the damage area of the target tissue after HIFU treatment cannot be imaged.In response to this problem,the vibration sound imaging method is introduced into the HIFU treatment system,conventional single-frequency incentives HIFU transcoders are transformed into a dual-frequency HIFU converter,and the converter is used for dual-frequency HIFU treatment and vibration imaging of the damaged area of the target tissue.Based on this system,the effects of frequency differences on the focusing performance and size of focus domain,as well as the effects of imitation tissue and different imaging depths on the quality of vibration imaging are studied.Then,with the imitation tis-sue and separated tissue as the radiation targets,visual vibrating imaging experiments of the damage areas of HIFU radiation target tis-sues are carried out.The experimental results show that the vibration imaging of different structures and characteristics of imitation tis-sue are better and the spatial resolution is high.In addition,the proposed imaging method provides on approch with application prospect for the damage area detection of HIFU treatment target tissue,improving the effectiveness and safety of HIFU treatment.
dual-frequency focused ultrasoundvibro-acoustographylow frequency vibration acoustic signalspatial resolution
万方数据
维普
