What does QR code scanning mean?

Interpretation of scanning: display pictures or graphics on the screen through the left and right movement of electron beams and radio waves; Sweep it.

Several meanings represented by science and technology: in medicine, scanning is to use a beam of X-rays to rotate around a patient who moves slowly forward, so as to obtain a series of pictures with different sections and draw images of the inside of the human body, which can help doctors diagnose diseases.

Railway stations, high-speed railway station, airports, etc. Scanning uses a beam of light to scan around the human body. In computer, CT scanning is the abbreviation of X-ray tomography.

There is also a kind of MRI scan in medicine, which puts the patient in a strong magnetic field and converts all the protons in the patient into the same type. These protons are hit back and forth by infinite electric pulses, and the emitted radio signals are received by the scanner and converted into electronic images.