sentences:  Chien and Kwong then used their early diffusion techniques to study human patients with stroke.In technically demanding circumstances (a low field MRI using conventional imaging, located in a parking lot trailer nearby the MGH) they were the first to demonstrate in human subjects the early drop in diffusivity seen in acute infarction in cats by Moseley.Consistent with his joint appointment in the Massachusetts Eye and Ear Infirmary, he and his colleagues were able to demonstrate that MRI could be used to study diffusion and flow in the living eye.