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| Magnetic resonance imaging of the brain ： ウィキペディア英語版 |
Magnetic resonance imaging of the brain
Magnetic resonance imaging (MRI) of the nervous system uses magnetic fields and radio waves to produce high quality two- or three-dimensional images of nervous system structures without use of ionizing radiation (X-rays) or radioactive tracers.
==History==
The first MR images of a human brain were obtained in 1978 by two groups of researchers at EMI Laboratories led by Ian Robert Young and Hugh Clow. In 1986, Charles L. Dumoulin and Howard R. Hart at General Electric developed MR angiography and Denis Le Bihan, obtained the first images and later patented diffusion MRI. In 1990, Seiji Ogawa at AT&T Bell labs recognized that oxygen-depleted blood with dHb was attracted to a magnetic field, and discovered the technique that underlies Functional Magnetic Resonance Imaging (fMRI). The first study of the human brain at 3.0 T was published in 1994, and in 1998 at 8 T. Studies of the human brain have been performed at up to 9.4 T.
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