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Magnetic resonance imaging in obstetrics
Published online by Cambridge University Press: 10 October 2008
Extract
The discipline of radiology owes its existence today to the discovery of bands of radiation in the electromagnetic spectrum which can penetrate human tissue, and thus can be exploited as windows for imaging. Magnetic resonance (MR) employs radio-frequency radiation and almost certainly represents the final such window in the electromagnetic spectrum for imaging. It is similar to Computerised Tomography (CT) in providing a cross-sectional display of body anatomy with excellent resolution of soft tissue detail. The images are essentially a map of the distribution density of hydrogen nuclei and parameters reflecting their motion in cellular water and lipids. The total avoidance of ionizing radiation, its lack of known hazard and the penetration of bone and air without attenuation, make it a particularly attractive non-invasive imaging technique.
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