Assessing cerebral microvascular volumetric with high-resolution 4D cerebral blood volume MRI at 7 T
This study introduces an innovative non-invasive 7T MRI method to measure microvascular volumetric pulsatility (mvPI) across different brain layers in humans. Researchers found that mvPI is highest at the brain's surface (pial mater) and significantly higher in the deep white matter of older participants compared to young ones, with even higher mvPI in older individuals with hypertension. However, the study involved a relatively small sample size (11 young, 12 older participants), which limits the generalizability of these age-related findings, especially for subgroup analyses.