Abstract #1294

Chang Y, Conradi M

Experimental measurements of the relaxation time T1 and diffusion D of perfluorocarbon (PFC) gas mixtures with oxygen are reported. The data will allow determination of local free diffusivity of the PFC gas in lung in vivo by localized T1 measurements. Knowledge of the free diffusivity is crucial for calculating the local surface-to-volume ratio in lung, which would be an important parameter in understanding and diagnosing emphysema.