When HIFU piezo ceramics technology is used for tumor treatment, especially for abdominal tumor treatment,it is breathing that will cause a large movement of the abdominal organs. The displacement can even reach a dozen millimeters. Anesthesia can stabilize the patient's breathing, but organ displac

With the development of science and technology, the non-destructive testing technology of temperature field has made great progress, and some non-destructive side temperature methods of HIFU piezo ceramic have been proposed.Such as electrical impedance tomography, magnetic resonance (M IR) ultrasoun

The temperature field of HIFU piezo ultrasound for tumor treatment can be generally divided into two types: thermotherapy and ablation therapy. The former is to heat the tumor about 43°C to 45°C,which keep it for several tens of minutes to inhibit tumor growth. The latter uses HIFU to make the targe

The measurement of 250Khz hifu piezo is mainly the focus sound field characteristic - it is the focusing parameter. Because ultrasonic waves are prone to cavitation and nonlinear effects under water and human tissues, it is unpredictable factors, especially the focused sound field characteristics of

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

The equivalent circuit of the complex stator of traveling wave type ultrasonic motor near the resonance frequency is shown . Each parameter of piezoelectric ceramics has the following meaning: the white is the equivalent with static capacitance, which is determined by the dielectric constant of the

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