Abstract #2502

Saam B, Laicher G, Anger B

Spin-lattice relaxation and diffusion of hyperpolarized Helium-3 is measured in a foam phantom as a function of compression and in other phantoms with well-defined surface-to-volume ratios. The spin-lattice relaxivity in the foam phantom is shown to be proportional to the surface-to-volume ratio. Surface-to-volume ratios and tortuosities are extracted from various phantoms.