Abstract #3486

Measuring the Transient Before Steady-State in Brain MR Elastography

Curtis L. Johnson¹, Bradley P. Sutton^2,3, John G. Georgiadis^1,3

¹Department of Mechanical Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States; ²Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States; ³Beckman Institute for Advanced Science & Technology, University of Illinois at Urbana-Champaign, Urbana, IL, United States

The time required for shear waves to reach steady state in Magnetic Resonance Elastography (MRE) of the brain is investigated. The temporal evolution of the in-plane displacement field of the brain was determined by employing SPAMM tagging with HARP processing during the typical head vibration used in MRE. Proper orthogonal decomposition of this field is then used to determine the time required for the brain to reach steady state. This information is of use to brain MRE practitioners for optimizing the actuation and acquisition method.