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Relaxometry of brain: Why white matter appears bright in MRI
The remarkable success of magnetic resonance imaging of adult brain relates to the unusually large ratio of the longitudinal relaxation rates 1 / T1 of white and gray matter, ∼2:1 at physiologicalExpand
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Theory of 1/T1 and 1/T2 NMRD profiles of solutions of magnetic nanoparticles
Organically coated iron oxide crystallites with diameters of 5–50 nm (“nanoparticles”) are potential magnetic resonance imaging contrast agents. 1/T1 and 1/T2 of solvent water protons are increasedExpand
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Cholesterol of myelin is the determinant of gray‐white contrast in MRI of brain
  • S. Koenig
  • Chemistry, Medicine
  • Magnetic resonance in medicine
  • 1 August 1991
The relative brightness of adult white matter in T1‐weighted MRI arises from myelin, but the mechanisms responsible remain to be clarified. Koenig et al. [Magn. Reson. Med. 14, 482 (1990)]Expand
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Transverse relaxation of solvent protons induced by magnetized spheres: Application to ferritin, erythrocytes, and magnetite
Since 1/T2 of protons of tissue water is generally much greater than 1/T1 at typical imaging fields, small single‐ion contrast agents–such as Gd(DTPA), which make comparable incremental contributionsExpand
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Magnetic field dependence of 1/T1 of protons in tissue.
It is well established that the spin-lattice magnetic relaxation rate 1/T1 of solvent protons in homogeneous protein solutions increases dramatically as the magnetic field is reduced well below theExpand
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Conformation as the determinant of saccharide binding in concanavalin A: Ca2+-concanavalin A complexes.
The existence of two conformational states of concanavalin A (Con A) with different metal ion binding properties has been recently demonstrated (Brown, R. D., Brewer, C. F., & Koenig, S. H. (1977)Expand
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