Saint-Petersburg State University of Information
Technology, Mechanics and Optics
*Saint-Petersburg State Electrotechnical University
A method for defining the factor
of diffusion of gadolinium atoms in the Gd-DTPA complex in water by means
of a nuclear magnetic resonance-tomograph, which is based on the influence
of uncoupled gadolinium electrons on the intensity of NMR signals from protons
of water is offered. Diffusion was observed simultane-ously in two parts
of a U-shaped tube by measuring the intensity of NMR signals depending on
time. An esti-mate for the diffusion factor of Gd-DTPA is obtained: D (Gd-DTPA)
= (2.4 +/- 0.3)× 10^-5 cm^2/s at (22 +/- 2) degree of Celsius.