Abstract #1613

Turbulences in a one bifurcation 4mm diameter phantom after inflating a balloon catheter: a 4D flow/cine phase invitro study at systemic pressure.

Cyril Tous, PhD¹, Ivan Dimov¹, Ning Li, PhD¹, Simon Lessard, PhD¹, An Tang, MD, MSc^1,2, Samuel Kadoury, PhD^1,3, and Gilles Soulez, MD,MSc^1,2

¹Radiology, Centre de recherche du Centre hospitalier de l’Université de Montréal, Montreal, QC, Canada, ²Radiology, Université de Montréal, Montréal, QC, Canada, ³Polytechnique Montréal, Montréal, QC, Canada

Turbulent flow undermines steering of magnetic microrobots across bifurcations using the MRI gradients. A partial inflated balloon can reproduce a blood flow controlling method in vivo, to increase the targeted success rate of embolization by microrobots. At 3T MRI, 4D flow reveals that vortices in front of the catheter were generated. These series of vortices are also confirmed through by ink injection and under videos capture. At 4 mm diameter, 4D flow and cine phase are reproducible for average velocity and net flow at 0.8mm² in plane resolution. These in vitro results can be used to refine 4D flow models.

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