With the rapid development of modern physics, people's understanding of the phenomena of life gradually deepened, the various branches of medicine are also more and more of their theories based on accurate physics, the technology and methods of physics in medical research and medical practice is also more and more widely used, X-rays on the great contribution of medicine is familiar to everyone for a long time, ultrasound The manufacture and application of ultrasound, scanner (B-ultrasound), and magnetic ****** vibration tomography (MBI) not only greatly reduce the patient's pain and creativity, but also improve the accuracy of the diagnosis, but also directly promotes the establishment and development of modern medical imaging, so that clinical diagnostic technology to take a qualitative leap.
X-ray fluoroscopy is based on the attenuation of X-rays by different tissues or organs, the intensity of uniform X-rays through different parts of the body after the intensity of different X-rays through the human body projected onto the photographic negative, after the development of the image can be observed in various parts of the dark and light of the different like. x-ray fluoroscopy can be observed to the extent of bone fractures, tuberculosis foci, the location and size of tumors in the body, the shape of organs and to determine the degree of foreign body. X-ray fluoroscopy has become one of the basic equipment in hospitals.
B ultrasound is ultrasound B type display tomography or like the abbreviation, the reason why the B ultrasound display is not on the past to show the results of the ultrasound method and the creation of a program to add a new name to the existing one-dimensional display of a string of pulsed program called A-type display, and the new two-dimensional longitudinal tomography is called the B-type display.
Time T1T2 imaging, the basic principle is the use of a certain frequency of electromagnetic waves to the license plate magnetic field in the human body irradiation, the human body in a variety of different tissues of the hydrogen nucleus in the role of electromagnetic waves, will occur in the nuclear magnetic **** vibration, absorption of the energy of the electromagnetic wave, and subsequently emitted electromagnetic waves, the MRI system detects these from the human body of the hydrogen nucleus emitted by the electromagnetic wave signals, after computer processing and image Reconstruction of the human body tomographic images, due to the hydrogen nucleus absorption and emission of electromagnetic waves, by the influence of the surrounding environment, so by the magnetic *** vibration signals from the human body tomographic images, not only can reflect the morphological information, but also from the image of the information related to the pathology of the imaging part of the human body can be compared and judged to know the imaging part of the tissue is normal or not. Therefore, MRI is considered to be a medical imaging technology to study active tissues and diagnose early lesions.