<qa>  What is the name of the metabolites that are analyzed by DWS?Diffusion weighted imaging DWI has been established as a major tool for the early detection of stroke. However, information obtained using conventional DWI may be incomplete. Diffusional kurtosis K is a quantitative measure of the complexity or heterogeneity of the microenvironment in white and grey matter, which offers complementary information and may potentially be a more sensitive biomarker for probing pathophysiological changes. In addition, to gain more specific insights into molecular mobility in the intracellular environment, it is beneficial to assess the diffusion properties of metabolites, such as N-acetylaspartate NAA, creatine and phosphocreatine Cr, and choline containing compounds Cho. Assessment of metabolite diffusion changes by diffusion-weighted spectroscopy DWS provides information specific to the intracellular environment. In particular, thanks to the specific compartmentation of NAA almost exclusively in neurons and of Cho in glial cells, the diffusion properties of these metabolites may provide specific insights into the pathological processes occurring independently in the two cell types. In addition, measuring a temporal profile of diffusion coefficient of these compounds may help clarify underlying pathophysiological changes in neuronal cells during acute ischemia. 