2021/06/30 by Alfredo Miguel Ordinola Santisteban, Santisteban, Alfredo Miguel Ordinola, Evren Özarslan +1
Medicine · Physics and Astronomy · #Advanced MRI Techniques and Applications #Advanced Neuroimaging Techniques and Applications #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Materials Science (cond-mat.mtrl-sci) #NMR spectroscopy and applications #cond-mat.mtrl-sci #physics.chem-ph #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.2106.16181
13 pages, 9 figures
arxiv created 2021/06/30 · openalex publication_date 2021/06/30 · arxiv updated 2021/07/01 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
We demonstrate the experimental determination of the diffusion propagator using magnetic resonance (MR) techniques. To this end, a recently introduced method was implemented on a benchtop MR scanner and incorporated into profiling and imaging sequences. Diffusion encoding was obtained by three gradient pulse pairs, each applied around a respective 180^∘ radiofrequency pulse. The data involving two independent wavenumbers were transformed from the measurement domain to the spatial domain, yielding an apparent diffusion propagator. For free diffusion, this apparent propagator converges to the true one when two of the pulse pairs are replaced with pulses of infinitesimal duration.