Keywords: Blood Vessels, Brain
Motivation: Cyclic pulsations of the brain’s blood vessels induce volumetric strain in the surrounding brain tissue, which can be observed using Displacement Encoding with Stimulated Echoes (DENSE).
Goal(s): To assess the impact of a major change in physiological boundary conditions on the existence of brain tissue compressions.
Approach: A two-stage clustering approach was applied to the volumetric strain data of a craniectomy patient. The clustering results of the patient were compared with previously acquired clustering results in healthy volunteers.
Results: While healthy volunteers showed a consistent cluster with systolic brain tissue compressions, this compression was absent in the craniectomy patient.
Impact: Clustering volumetric strain data from a craniectomy patient revealed the absence of a compression cluster, confirming the physiological basis of observed systolic brain tissue compressions in healthy volunteers. Furthermore, it highlights the crucial role of boundary conditions in brain pulsatility.
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