History of MRI
1946 Felix Bloch and Edward Purcell discover magnetic resonance phenomenon.
1950s Herman Carr creates a one-dimensional MR image.
1971 Raymond Damadian reports that tumors and normal tissue respond differently to NMR experiment.
1972 Raymond Damadian applies for a patent, which describes the concept of NMR being used for above purpose. He illustrates major parts of MRI machine in his patent application.
1973 Paul Lauterbur shows an MR image of a test tube.
1974 Raymond Damadian receives his patent.
1975 Richard Ernst proposes using phase and frequency encoding and Fourier transform for acquisition of MR images.
1977 Raymond Damadian produces MR image of the whole body.
1977 Peter Mansfield improves mathematics behind MRI and develops echo-planar technique, which allows images to be produces in seconds and later becomes the basis for fast MR imaging.
1983 Ljunggren and Tweig introduce k-space.
1986 Le Bihan publishes an article in Radiology, which describes diffusion weighted imaging (DWI).
1987 Real time MR imaging of the heart is developed.
1991 Filler and colleagues describe imaging of axonal transport of supermagnetic metal oxide particles, a technique, which later becomes important in imaging of neural tracts.
1993 Functional MR imaging of the brain is introduced.
1994 The first intraoperative MR unit developed by GE and Harvard is installed in the Brigham and Women's Hospital in Boston.
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