Angiography and MRI

Angiography is an interventional detection method that injects contrast agent into blood vessels. Because X-rays cannot penetrate the developing agent, angiography uses this characteristic to diagnose vascular lesions through the images displayed by the developing agent under X-rays.

Nuclear magnetic resonance is a physical process in which the spin energy level of an atomic nucleus with a non-zero magnetic moment undergoes Zeeman splitting under the action of an external magnetic field, and the nuclear magnetic resonance absorbs radio frequency radiation of a certain frequency. Nuclear magnetic oscillation spectroscopy is a branch of spectroscopy. Its oscillation frequency is in the radio frequency band, and the corresponding transition is the transition of the nuclear spin in the nuclear Zeeman energy level.

Magnetic resonance imaging (MRI) application: Magnetic resonance imaging (MRI) examination has become a common imaging examination method. As a new imaging examination technology, MRI examination It will have an impact on human health, but six categories of people are not suitable for MRI examinations: people with pacemakers, people with or suspected of having metal foreign bodies in the eyeballs, people who have undergone silver clip ligation of aneurysms, People with metal foreign bodies or metal prostheses in their bodies, critically ill patients with life-threatening conditions, and patients with claustrophobia. Monitoring instruments and rescue equipment cannot be brought into the MRI examination room. In addition, pregnant women who are less than 3 months pregnant are best not to undergo MRI examinations.