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Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a technique used to visualize different structures in the body. MRI uses principles of nuclear magnetic resonance (NMR). The term nuclear was dropped because of its negative connotations. MRI scanners contain large high-field strength magnets. Patients are placed in the scanner, and signals are sent and received from the body’s hydrogen nuclei using a radio-wave antenna. Using a computer, images are constructed from the signals received from the body. MRI does not involve ionizing radiations and is able to acquire images in more than one orientation (e.g., sagittal, coronal, and axial), but with limitations, which makes analysis of the images complicated. Another advanced type of imaging is diffusion weighted imaging (DWI), which relies on signals from the random Brownian motion ...

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