History of MRI

Anil Kumar

Abstract


A brief account of the basic principle and methodologies of MRI technique, right from its beginning, are outlined. The final pulse sequence used for MRI using Fourier Imaging (phase encoding), Echo-Planar Imaging(EPI) for detection of a whole plane in a single excitation and T1 and T2 contrast enhancement is explained. The various associated methods such as,MR-spectroscopy, flow measurement (MRI-angiography), Lung- imaging using hyperpolarized Xe-129 and He-3 and functional imaging (f-MRI) aredescribed.

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