The 3D-PAULM image shows both the vascular network of the brain (blood/oxygen) while the red and yellow shows the movement of cerebrospinal fluid through the glymphatic system. The 3D-PAULM image shows both the vascular network of the brain (blood/oxygen) while the red and yellow shows the movement of cerebrospinal fluid through the glymphatic system. Often described as the brain’s cleaning system, the glymphatic system uses cerebrospinal fluid to wash away waste, damaged proteins, and other debris that accumulate during normal brain activity. Disruptions to the glymphatic system have been linked to aging, stroke, traumatic brain injury, and neurodegenerative diseases such as Alzheimer's. Existing imaging tools can visualize parts of the brain, but they often require invasive procedures or fail to provide a detailed view of how fluid moves throughout the entire brain.