FIGURE 8.

4D animation of volumetric 3D aMRI (Supporting Information Videos [Link], [Link]). The novel 3D algorithm exquisitely captures the brain tissue and CSF motion, helping to highlight the “piston‐like” motion of the ventricles that is thought to drive the passage of CSF throughout the brain. The heart rate temporal frequency (±0.1) motion was amplified with an amplification parameter of 50 and amplitude‐weighted Gaussian smoothing with $\sigma =5$, while attenuating the motion related to all other temporal frequencies