mra is magnetic **** vibration imaging.
Nuclear magnetic **** vibration imaging, also known as spin imaging, also known as magnetic **** vibration imaging, is the use of nuclear magnetic **** vibration principle, based on the release of energy in the material inside the different structure of the environment of the different attenuation, through the external gradient magnetic field detection of the electromagnetic waves emitted, you can learn the composition of this object the location of the nucleus and the type of the object can be plotted according to the internal structure of the object.
Using this technique to image the internal structure of the human body creates a revolutionary medical diagnostic tool. The application of rapidly changing gradient magnetic fields has greatly accelerated the speed of nuclear magnetic **** vibration imaging, making the application of this technology in clinical diagnosis and scientific research a reality, and greatly promoting the rapid development of medicine, neurophysiology and cognitive neuroscience.
From the discovery of the phenomenon of nuclear magnetic **** vibration to the maturity of MRI technology during this period of several decades, the field of research on nuclear magnetic **** vibration in the three fields (physics, chemistry, physiology or medicine) within the six Nobel Prizes, enough to illustrate the importance of this field and its derivative technology.
Advantages of magnetic **** vibration imaging
1, good resolution of soft tissue. It is superior to CT for bladder, rectum, uterus, vagina, bones, joints, muscles and other parts of the body.
2, a variety of parameters can be used for imaging, multiple imaging parameters can provide a wealth of diagnostic information, which makes medical diagnosis and the study of metabolism and function in the human body convenient and effective. For example, the T1 values of hepatitis and cirrhosis become larger, while the T1 values of hepatocellular carcinoma are even larger, and T1-weighted images are made to distinguish benign tumors from malignant tumors in the liver.
3. By adjusting the magnetic field, the desired profile can be freely selected. This makes it possible to obtain images of areas that are inaccessible or difficult to access by other imaging techniques. For intervertebral discs and spinal cord, sagittal, coronal, and cross-sectional imaging can be used to visualize nerve roots, spinal cord, and ganglia. Unlike CT, it can only acquire cross-sections perpendicular to the long axis of the body.
4, no ionizing radiation damage to the human body.
5. In principle, all nuclear elements with non-zero spin can be used for imaging, such as hydrogen (H), carbon (C), nitrogen (N and N), phosphorus (P), and so on.