The projected rise in Alzheimer's disease cases underscores the urgency of finding effective treatments, as current options only manage symptoms. Early intervention before significant cognitive decline is vital, necessitating reliable biomarkers to identify at-risk individuals. Promising research on quantitative cerebral blood flow suggests its potential as an early biomarker, but further studies are needed to fully understand its spatiotemporal patterns in Alzheimer's disease and to account for potential confounding factors in analyses.