Fiber grating refers to a segment of fiber with grating function formed by changing the distribution of refractive index in the fiber by ultraviolet radiation. It only reflects a certain wavelength of wave, which is equivalent to a kind of mirror. When there is strain or temperature change, it will

High intensity focused ultrasound (HIFU) has developed rapidly in recent years and has become a research hotspot in the medical ultrasound engineering field. HIFU surgery is to concentrate the low-intensity ultrasound in vitro into the body through a certain focusing method (acoustic lens, concave s

With the development of medical technology, high intensity focused ultrasound (HIFU) has been widely developed at home and abroad as a new non-invasive tumor treatment technology, and has achieved significant clinical results, especially in the treatment of uterine fibroids and good clinical results

At present, the methods for studying the sound field of HIFU piezo ceramic mainly include experimental measurement methods and numerical simulation methods.The methods for measuring high-intensity ultrasonic sound fields are mainly hydrophones, ultrasonic radiation balances and fiber optic sensors.t

The principle of HIFU piezo ceramic tumor treatment is to concentrate the ultrasound energy into the disease tissue by a certain focusing method.due to the strong energy deposition of the focal point, makes the focal region in a short time (0.5-5s).The target tissue temperature rises above 60C, whic

HIFU piezo ceramic technology as a new clinical treatment method, mainly including extracorporeal shock wave lithotripsy (ESWL)therapy, HIFU tumor treatment and extracorporeal shock wave lithotripsy (ESWL) treatment technology. Extracorporeal shock wave lithotripsy is the use of ultrasound or lo

Medical ultrasound transducer can be divided into diagnostic ultrasound and therapeutic ultrasound. Diagnostic ultrasound is ultrasonic frequency of 1 to 10 MHz.The low-energy form is applied to the clinic, mainly for the purpose of extracting biological information, and Pzt material stripe piezo ce

In this section, two kinds of piezoelectric ceramics composite materials with a center frequency of around 50 MHz are prepared to prepare two kinds of poly. Focused ultrasonic transducers in the form of a focal point are spherical focus and cylindrical line focus, respectively. The schematic diagram

Main applications of high frequency high intensity focused ultrasound at home and abroad. With the development of transducer materials and mechanical fabrication techniques, the frequency of ultrasonic transducers is now increasing. In general, higher frequency sound waves can resolve finer biologic

Since 1880, French physicists P. Curie and J. Curie have discovered the Piezoelectric effect piezo element.The current piezoelectric effect materials can be roughly divided into three categories,it is piezoelectric single crystals, including ferroelectric Piezoelectric discs transducer,non-ferroelec

A new type two-dimensional spherical crown array is designed. Based on the self-built sound field platform, the sound field characteristics of the model are studied. Finally, the structure characteristic parameters F-number, arrangement and other structures of the array are found. The characteristic

In the manufacturing of diagnostic ultrasonic transducers, in order to improve the sensitivity of the probe detection signal, the resolution of the imaging .As well as better fixing the probe array, engineers will design solid-state acoustic matching components for the probe, such as matching layer

For the multi-array dome array of HIFU piezo ceramics, the different array arrangement means that the array has different structural characteristics, and different structural characteristics will correspond to different array sound field characteristics, such as the same focus , different focal leng

In order to achieve quantitative analysis of the sound field characteristics of the HIFU piezo ceramic treatment probe in the single focus scanning mode, The following three key acoustic field characteristics are studied.