a noninvasive medical diagnostic technique in which the absorption and transmission of high-frequency radio waves are analysed as they irradiate the hydrogen atoms in water molecules and other tissue components placed in a strong magnetic field. This computerized analysis provides a powerful aid to the diagnosis and treatment planning of many diseases, including cancer MRI
magnetic resonance imaging n.
The use of a nuclear magnetic resonance spectrometer to produce electronic images of specific atoms and molecular structures in solids, especially human cells, tissues, and organs.
magnetic resonance imaging
magnetic resonance imaging (MRI)
A technique for forming detailed images of internal organs and tissue. It works by putting the patient inside a magnet, then using radio waves to locate atoms in the tissue. Final production of the image is done by a computer. (Compare x-ray and ultrasound.)
Note: MRI images are the most detailed that can be obtained.
noun 1. .
noun 1. .
- Magnetic reversal
magnetic reversal A change in the Earth’s magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north. Also called geomagnetic reversal. Our Living Language : When magma rises to the Earth’s surface at a mid-ocean ridge, it flows out onto both sides […]
noun, Metallurgy. 1. roasting of a nonmagnetic ore to render it magnetic so that it can be separated from gangue by means of a magnetic field.