As an organic whole, the internal function and structure of healthy people cannot be decomposed and examined, and because some diseases have no obvious clinical symptoms and signs in the early stage, imaging examination is particularly important. With the rapid development of modern medical imaging technology and its wide application in clinic, the detection rate and diagnostic accuracy of medical imaging for various diseases have been significantly improved.

As an organic whole, people can't decompose their internal functions and structures, and because some diseases have no obvious clinical symptoms and signs in the early stage, imaging examination is particularly important.