Magnetic resonance imaging: Difference between revisions
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[[ | [[Image:MR Knee.jpg|thumb|[[Sagittal]] MR image of the knee]] | ||
'''Magnetic resonance imaging''' ('''MRI'''), '''nuclear magnetic resonance imaging''' ('''NMRI'''), or '''magnetic resonance tomography''' ('''MRT''') is a [[medical imaging]] technique used in [[radiology]] to visualize detailed internal structures. The good [[contrast (vision)|contrast]] it provides between the different soft tissues of the body make it especially useful in [[neurology|brain]], [[human musculoskeletal system|muscles]], [[cardiovascular|heart]], and [[oncology|cancer]] compared with other [[medical imaging]] techniques such as [[computed tomography]] (CT) or [[Medical radiography|X-ray]]s. | '''Magnetic resonance imaging''' ('''MRI'''), '''nuclear magnetic resonance imaging''' ('''NMRI'''), or '''magnetic resonance tomography''' ('''MRT''') is a [[medical imaging]] technique used in [[radiology]] to visualize detailed internal structures. The good [[contrast (vision)|contrast]] it provides between the different soft tissues of the body make it especially useful in [[neurology|brain]], [[human musculoskeletal system|muscles]], [[cardiovascular|heart]], and [[oncology|cancer]] compared with other [[medical imaging]] techniques such as [[computed tomography]] (CT) or [[Medical radiography|X-ray]]s. | ||
Unlike CT scans or traditional X-rays MRI uses no [[ionizing radiation]]. Instead it uses a powerful [[magnetism|magnetic]] field to align the [[Nuclear magnetic moment|magnetization]] of some [[atom]]s in the body, then uses [[radio frequency]] fields to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body. | Unlike CT scans or traditional X-rays MRI uses no [[ionizing radiation]]. Instead it uses a powerful [[magnetism|magnetic]] field to align the [[Nuclear magnetic moment|magnetization]] of some [[atom]]s in the body, then uses [[radio frequency]] fields to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body. | ||
Latest revision as of 15:24, 1 November 2010
Magnetic resonance imaging (MRI), nuclear magnetic resonance imaging (NMRI), or magnetic resonance tomography (MRT) is a medical imaging technique used in radiology to visualize detailed internal structures. The good contrast it provides between the different soft tissues of the body make it especially useful in brain, muscles, heart, and cancer compared with other medical imaging techniques such as computed tomography (CT) or X-rays.
Unlike CT scans or traditional X-rays MRI uses no ionizing radiation. Instead it uses a powerful magnetic field to align the magnetization of some atoms in the body, then uses radio frequency fields to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body.