Evaluation of Two Fast Virtual Stenting Algorithms for Intracranial Aneurysm Flow Diversion

• DOI: 10.2174/1567202617666200120141608
• Publication Date: 2020-01-28T09:57:41Z
• Authors: Saeb R. Lamooki; Vincent M. Tutino; Nikhil Paliwal; Robert J. Damiano; Muhammad Waqas; Setlur S.V. Nagesh; Hamidreza Rajabza...; Kunal Vakharia; Adnan H. Siddiqui; Hui Meng
• Keywords: Flow diverter

Endovascular treatment of intracranial aneurysms (IAs) by flow diverter (FD) stents depends on modification. Patient-specific modeling FD deployment and computational fluid dynamics (CFD) could enable a priori endovascular strategy optimization. We developed fast, simplistic, expansion-free balls-weeping algorithm to model FDs in patientspecific aneurysm geometry. However, since such strong simplification result less accurate simulations, we also fast virtual stenting workflow (VSW) that explicitly models stent expansion using pseudo-physical forces.To test which these two algorithms more accurately simulates real FDs, applied them virtually treat three representative patient-specific IAs. deployed Pipeline Embolization Device into 3 silicone phantoms simulated the treatments both VSW models. then compared against experimental results terms geometry post-treatment fields. For geometry, evaluated gross configurations porosity. aneurysmal flow, CFD measurements particle image velocimetry.We found created realistic deployments than porosity pore density. In particular, produced unrealistic bulging at neck, this artifact drastically increased with neck size. Both methods resulted similar patterns, but had error velocity inflow rate.In conclusion, is critical for preventing effects thus should be considered algorithms. Also endowed its high efficiency superior accuracy, better candidate implementation bedside clinical tool simulation.