Imaging - Clinical Evaluation of Altered Nervous System Drainage

The current study aims to evaluate the aspects of perfusion, fluid diffusivity in the interstitium and the T1 and T2 signal of the PVS and WMH. The current study has the following objectives: a) evaluate the perfusion aspects using the gadolinium-based contrast medium of brain tissues in the short term; b) the direction of flow of fluids at very low speed in the white matter using the DTI sequences configured for this purpose; c) T1-mapping of the lesions of interest. The expected results will help us understand two aspects of neurofluid dynamics: a) how the fluid moves within the central nervous system in the first minutes after the injection of the tracer (in our case the gadolinium-based contrast medium) and b) what is the composition of the fluid within the PVS and WMH and how can investigators characterize them more accurately.