@book {385, title = {Proc. of the Int. School of Physics, Enrico Fermi Course CXXXIX - Magnetic Resonance and Brain Funtion: Approaches from Physics}, series = {NMR and MRI of Laser-Polarized Noble Gases in Molecules}, year = {1999}, publisher = {IOS Press}, organization = {IOS Press}, chapter = {211-226}, author = {Goodson, B.M. and Kaiser, L. and Pines, A.} }