The measurement of ultrasonic working frequency, focal length, focal spot, sound intensity, side lobes and other key parameters and the quality of the focused sound field are the key to HIFU piezo ceramictechnology engineering, which have an inseparable relationship with the performance, efficacy an

The study of high-intensity focused ultrasound technology has been make effect since the 1940s, but limited by engineering technology at the time, the technology has not been rapidly developed. With the rapid development of related technologies such as computers, technology has attracted great atten

With the development of HIFU piezo ceramic technology, the HIFU technology has attracted great attention on the engineering and medical circles. Many units in China have carried out research and development and clinical application of HIFU equipment, and have achieved remarkable results. this paper

In order to realize the HIFU ultrasound piezo, the traditional methods mostly use a single frequency ultrasonic transducer, and the use of the same focusing system to achieve the focus of the two frequency ultrasound is rarely reported. In 1996, Japanese scholar S. Umemura et al. studied a technique

(1) About planar annular array transducer. A concentric small circular area is dug in the center of the circular piston source to form an annular planar sound source.The sound pressure generated by the annular planar sound source at any point in space can be regarded as the sound pressure generated

High-intensity focused ultrasound (HIFU) technology is originated in the 1940s. It is a certain way to make the ultrasound accumulate on the lesion tissue after passing through the body surface. After the interaction between the cells and the ultrasound in the lesion tissue. Producing irreversible c

The maximum sound pressure and the rising temperature is produced by the two sound sources differ greatly, but the ratio of the maximum temperature rise to the maximum sound absorptivity is almost the same.High intensity focused piezoelectric ceramic is indicating that the efficiency of the absorpti

Heating tumor tissue has become one of the important methods for treating tumors. Ultrasound has become an important heating treatment because of its characteristics of easy to produce,it is focusable and invasive. In recent years, HIFU piezo for thermoplastic weight heating therapy technology has d

Considering the basic requirements of real-time imaging of tumor treatment ,It includes compatibility considerations and cost control requirements of the ultrasound therapy machine itself, the domestic commercial HIFU piezo ceramic ultrasound tumor treatment machine has selected B-ultrasound as for

This method is simple in the idea and convenient to implement, but because the image accuracy of the B-ultrasound itself is not high, and the information contained the two orthogonal sections itself which is not enough to represent the entire lesion itself, the shape of the tumor is not mostly elli

In recent years, the application of HIFU piezo transducer ultrasound in the field of tumor treatment has been widely concerned at home and abroad. It has been reported that nearly 10 domestic manufacturers have invested a lot of manpower and resources to develop in the clinical applications in the m

Multi-array HIFU piezo ceramic ultrasound transducers can also be divided into two types, one is pure multi-array form, and the other is multi-phase phased array focusing. A pure multi-array element generally places a plurality of piezoelectric ceramic sheets in the concave spherical surface of seve

HIFU piezo for ultrasonc knife has the outstanding advantages of no pain, no surgery, short side effects, short treatment and recovery time, which has become a hot spot in the research of tumor treatment equipment. However, due to its therapeutic effect, it has yet to be extensively clinically teste

High intensity focused ultrasound(HIFU)technology asa non is an invasive treatment way that have been used in tumor disease,which will make the ultrasound piezo be in the target region under the thermal effects,cavitation effects and mechanical effects of ultrasound .The lesions could be destroyed