Mri scan
MRI Scan
Magnetic Resonance Imaging (MRI) (pronunciation: /ˌmæɡ.nɪ.tɪk.rɪ.zəˈnæns ˈɪm.ɪ.dʒ.ɪŋ/), is a non-invasive imaging technology that produces three dimensional detailed anatomical images. It is often used for disease detection, diagnosis, and treatment monitoring. It is based on sophisticated technology that excites and detects the change in the direction of the rotational axis of protons found in the water that makes up living tissues.
Etymology
The term "Magnetic Resonance Imaging" is derived from the physical phenomenon of nuclear magnetic resonance (NMR), in which nuclei in a strong magnetic field are perturbed by a weak oscillating magnetic field and respond with a radio frequency signal. The term "MRI" was coined by the American physician Raymond Damadian who was awarded the first patent for the concept of MRI in 1974.
Procedure
An MRI scan uses a large magnet and radio waves to look at organs and structures inside the body. The patient lies on a table that slides into a tunnel-shaped machine, where the MRI creates a strong magnetic field around the patient. A computer then takes the signals from the MRI and uses them to make a series of pictures. Each picture shows a thin slice of the body.
Related Terms
- Nuclear Magnetic Resonance (NMR): The physical phenomenon upon which MRI is based.
- Computed Tomography (CT): Another type of imaging technique that uses X-rays to create detailed images of the body.
- Radiology: The medical specialty that uses medical imaging to diagnose and treat diseases within the body.
- Contrast Agent: A substance used to increase the contrast of structures or fluids within the body in medical imaging.
See Also
External links
- Medical encyclopedia article on Mri scan
- Wikipedia's article - Mri scan
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