Lao Jiang talks about ultrasound: a talk about the development of ultrasound imaging systems

In the old club, thanks to the international layout that the old club started early, there are often opportunities to communicate with the top engineers in the industry, and the details of all aspects of the development of the imaging system have been thoroughly communicated. When young and frivolous, I often feel that this is not the case. Of course, there are some help in the method. It is far from the point where people can slap the top, and their methods should be said to have their own merits, not a wonderful pen, or a stone. One of the great gods often said that "the basic theory of physics related to ultrasound, Rayleigh researched almost in 1900, don't talk about subversive technology with me", the words may be a bit biased, but for the current commercial ultrasound imaging equipment In fact, Rayleigh's theory is enough.

This is the great god Rayleigh, the most hated person when I was a graduate student.

Personally, since the 1990s, the ultrasound system has really made epoch-making progress:

Digital change. On the one hand, methods that were previously stuck in theory and could not be realized can be achieved (such as continuous focusing of the receiving beam or even continuous focusing of the transmitting beam), and on the other hand, image processing techniques in other fields are easily transplanted to ultrasound.

Harmonic technology and contrast harmonics. Harmonic theory is also very old, but the direct use of harmonics for imaging is indeed a major initiative. Today, some parts of the inspection, such as the heart, basically only use harmonics to see the two-dimensional B image.

Elastic correlation imaging. Among the three main imaging modes in ultrasound medical imaging: look at the B-mode of the two-dimensional structure, look at the spectral Doppler (PW/CW) of blood flow velocity, and COLOR imaging (CDFI) of blood flow distribution. Elastography may be the fourth imaging mode that can rise to the same position as the first three.

In addition: There have been some technological advances in ultrasound probes for more than a decade. For example, the use of single crystal materials is not mentioned here because it is not an area familiar with Chiang Kai-shek.

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