mag·net·ic resonance (m g-n t  k)n. The absorption of specific frequencies of radio and microwave radiation by atoms placed in a magnetic fielding. |
magnetic resonance (MR),
a phenomenon in which the atomic nuclei of certain materials placed in a strong, static magnetic field absorb radio waves supplied by a transmitter at particular frequencies. The energy of the radio waves promotes the nuclei from a low-energy state, in which the nuclear spin is aligned parallel to the magnetic field, to a higher-energy state, in which the nuclear spin has a component transverse or opposed to the field. These nuclei occasionally revert to the lower-energy state by emitting photons at characteristic (resonance) frequencies, providing information about the local magnetic field at the nuclei. The rate at which the nuclei revert, or relax, to the lower-energy state when the source of radio waves is turned off is another important factor. See also relaxation time.
magnetic resonance
The absorption or emission of electromagnetic energy by nuclei in a static magnetic field after excitation by a suitable resonance frequency magnetic field; the peak resonance frequency is proportional to the magnetic fiel,
and given by the Larmor equation. See Magnetic responance imaging.
Patient discussion about magnetic resonance.
Q. who much cost the resonance magnetic machine? new or used
A. here is a company that you can even get a MRI scanner in a leasing program:
http://www.nationwideimaging.com/index.php
Read more or ask a question about magnetic resonancehttp://www.nationwideimaging.com/index.php
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|