Diffusion Pore Imaging by Double Wave Vector Measurements

Tristan Anselm Kuder¹, Frederik B. Laun¹, ²

NMR diffusion measurements allow collecting the signal from the whole sample. This mainly eliminates the problem of vanishing signal at increasing resolution. It has been a longstanding question if the exact shape of closed pores can be determined by diffusion measurements. Here, we present a method using short diffusion gradient pulses only, which is able to reveal the shape of arbitrary closed pores. Compared to former approaches, the method has reduced demands on relaxation times due to faster convergence to the diffusion long time limit and allows for a more flexible NMR sequence design since stimulated echoes can be used.