The nuclear magnetic resonance * * vibration is a physical process in which the spin energy level of the nucleus with non-zero magnetic moment splits Zeeman under the action of an external magnetic field, and the * * vibration absorbs a certain frequency of radio frequency radiation. Nuclear magnetic resonance spectrum is a branch of spectroscopy, its vibration frequency is in radio frequency band, and the corresponding transition is the transition of nuclear spin at nuclear Zeeman level.
Application of nuclear magnetic resonance * * * vibration;
Magnetic resonance imaging (MRI) has become a common imaging method. As a new imaging technology, nuclear magnetic resonance will not affect human health, but there are six groups of people who are not suitable for nuclear magnetic resonance examination:
People who install pacemakers, people who have or are suspected to have metal foreign bodies in their eyeballs, people who have silver clips for aneurysms, people who have left behind or metal prostheses in their bodies, critically ill patients with life-threatening problems, claustrophobic patients, etc. No monitoring instruments, rescue equipment, etc. Enter the MRI room. In addition, pregnant women less than 3 months pregnant, it is best not to do magnetic resonance imaging.
Baidu encyclopedia-nuclear magnetic resonance