Determinants of the long-range apparent diffusion coefficient in the human lung: collateral channels or intra-acinar branching?

Abstract

to the editor: We have given considerable thought to the study by Bartel and colleagues ([1][1]) in an attempt to reconcile their simulation of the long-range apparent diffusion coefficient (LRADC) obtained from hyperpolarized helium-3 experiments in human lungs, with our own simulation using