At present, ultrasound examination has become an indispensable and important examination and treatment work in clinical work. Ultrasound research is no longer limited to simple examination and discovery of disease foci, but has developed towards fine measurement, in-depth functional analysis and quantitative and qualitative analysis of various professional parameters.

(I) Development trend and advantages of B-ultrasound diagnosis.

(1) Real-time application of three-dimensional technology.

Currently, three-dimensional ultrasound imaging has three imaging modes: surface imaging, transparent imaging and multi-plane imaging (or cross-sectional imaging). It has been applied to the diagnosis and research of heart, liver, peripheral blood vessels, kidney, fetus, etc., as well as in obstetrics, cardiac intervention and cardiac surgery. In particular, three-dimensional color ultrasound is equipped with variable frequency probe, wide-band probe and ultrasound CT software, making the image clearer and more realistic, with higher resolution and wider clinical application. However, it also has its limitations, such as its low resolution.

(2) The continuous expansion of the application field of color ultrasound.

CDFI and its development use the frequency shift of echo signals to obtain blood flow movement information, which greatly improves the level of ultrasound diagnosis and is considered to be the biggest breakthrough in ultrasound diagnosis technology. The recently launched real-time three-dimensional echocardiogram is a new breakthrough in the field of ultrasound medicine. It can realistically display the stereoscopic image of the heart structure, chamber size, blood vessel direction, valve morphology and activity pattern, and is simple to operate, fast imaging and clear images, which is of great significance for the diagnosis of cardiovascular diseases.

(3) The development trend of miniaturization of ultrasound instruments.

One of the biggest changes in the development of ultrasound diagnostic instruments is that the instrument size is constantly shrinking and the weight is constantly decreasing. With the high degree of integration of a large number of electronic circuits, the original large electronic circuit parts are constantly shrinking. At present, the smallest ultrasound diagnostic instrument used in clinical practice has reached less than 3Kg, making bedside ultrasound examination, ultrasound monitoring during surgery, and continuous ultrasound observation during delivery a reality. In addition, portable ultrasound diagnostic instruments have more obvious advantages in grassroots surveys. Moreover, due to high integration and full digitalization, the image quality, resolution, various functions and performance of portable ultrasound diagnostic instruments can be comparable to those of ordinary ultrasound instruments. At the same time, the momentum for the development of special B-ultrasound and economical color ultrasound is also growing.

(4) ultrasound probes have become the forerunner of improving the functions of B-ultrasound machines.

In recent years, new piezoelectric ceramics, single crystals and other polymer composite materials have been used to make new ultra-wideband probes, which have the advantages of low acoustic impedance, weak lateral coupling, strong electromechanical coupling, high sensitivity and ultra-wideband. Within the original scale, the number of probe elements has increased dramatically, supporting multi-channel technology, enhancing lateral resolution, greatly improving the system spatial gain, and rapidly improving image quality. At the same time, advanced image processing technology is used to obtain clear lesion images, assisted by accurate analysis software, which greatly improves the diagnostic level. Various special probes have been launched, so in addition to full-body multifunctional B-ultrasound, special high-performance B-ultrasound has also accelerated its development.

(5) Fully digital B-ultrasound has accelerated the development speed.

Full digitization can optimize images to achieve the goals of improving accuracy (high resolution), reducing interference (clear images), facilitating storage (memory playback), intuitive display (three-dimensional reconstruction), stability and reliability (reducing failures), and network management (telemedicine).