‎"TORREY, H. C.‎
‎Bloch Equations with Diffusion Terms. - [THE BLOCH-TORREY EQUATION]‎

‎Lancaster and New York, American Institute of Physics, 1956. Lex8vo. Volume 104, November 1, No. 3, 1956 of ""The Physical Review"", Second Series. In the original printed blue wrappers. A small stain to front wrapper, otherwise a very nice and clean copy. Pp. 975-980. [Entire issue: Pp. 933-1188].‎

Reference : 43435

‎First edition of the important paper in which the Bloch-Torrey equation is first described. H.C. Torrey showed mathematically how the Bloch equations, a set of macroscopic equations that are used to calculate the nuclear magnetization, would change with the addition of diffusion. Torrey modified Bloch's original description from 1946 of transverse magnetization to include diffusion terms and the application of a spatially varying gradient. Today the equation is used in magnetic resonance imaging (MRI), a method that produces images of biological tissues weighted with the local micro-structural characteristics of water diffusion. Diffusion tensor MRI can provide information about connections among brain regions.‎