All-in-one interventional MR elastography (MRE) system dedicated to MR-guided percutaneous procedures
Nadge Corbin 1 , Elodie Breton 1 , Quentin Boehler 1 , Laurent Barb 1 , Pierre Renaud 1 , Michel de Mathelin 1 , and Jonathan Vappou 1
ICube, Universit de Strasbourg, CNRS,
An all-in-one interventional Magnetic Resonance
Elastography (MRE) system is developed in order to
provide supplementary contrast based on biomechanical
properties. Shear waves are generated inside the tissue
with a piezoelectric needle driver. Induced waves are
visualized in phase images acquired with an interactive
real-time spoiled gradient echo sequence including
motion sensitizing gradients with fractional encoding.
An online inverse problem solver based on the local
frequency estimation algorithm computes the elastogram
in real-time. The complete interventional MRE system is
successfully tested on a heterogeneous gelatin phantom
with a total acquisition time of 2.15s per elastogram.
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