Organizing Committee
	Program
	Over the last 15 years, diffusion MRI has enjoyed a tremendous growth, from basic science to major clinical applications, such as brain ischemia. Diffusion MRI is now a popular topic in major meetings.  Still there are many questions about what we really measure in biological tissues with diffusion MRI. Tissues are complex, organized structures where the diffusion process largely differs from what is observed in free, infinite, homogeneous media.  There is now a growing body of knowledge in the literature, sometimes controversial, about diffusion measurement in biological tissues (not only from MRI), and the time has come to bring together experts in the field to share their views on what they believe is really measured with diffusion MRI.