A General approach to measurements in the presence of internal gradients.

Highlights: [•] Internal gradients influence T 2 relaxation times at any magnetic field strength. [•] A general approach is adopted for separating relaxation and diffusion exponents. [•] Accurate T 2 relaxation time distributions are obtained. [•] The method is demonstrated for water saturated glass bead packs. [•] Our technique is applicable to a wide range of porous materials. [Copyright &y& Elsevier]