We know that medical physics mainly studies the physical interpretation of the operating process of the human organ or human body system, the physical properties of human tissues and physical factors on the human body's role in the mechanism, as well as the human body's internal bioelectricity, magnetism, acoustic, optical, thermal and other physical phenomena such as the response and physical instrumentation of the measurement technology in the application of medical treatment. China guided to join the International Society of Medical Physics organization officially only in 1986. With the development of computer technology, medical physics is more and more towards the extension of precise physical technology. The application of optical fiber technology in the medical field of catheter imaging has been well known. It can be said that there is no modern medicine without physics.