Blood flow simulation within stented aneurysms

One of the main challenges of Thrombus is to perform the modeling of a flow diverter armed with 48 struts.

The main research topic leads to the modelling of the deployment of a virtual flow diverter within a parent vessel allowing the study of the effect on the blood flow within the cavity of an aneurysm. To perform this task, great efforts have been deployed; in fact to achieve the objectives the successive operations must be optimized and consist in the 3D segmentation of medical imaging sequences, the virtual deployment of a flow diverter and in fine the computational fluid dynamics.

 

Stent Modelling

In each case theoretical tools have been investigated:

- The Level Set Method, the Subjective Surface and the Lattice Boltzmann Method dedicated to Image Processing for the Segmentation operation.

- The theory of the Generalized Cylinder for the modeling and deployment of the stent

- The Lattice Boltzmann Method for solving the blood flow simulation considering patient specific cases.

 

Streamlines
 

The results of simulation are relevant

and allow analyzing with accuracy the impact of the stent on the behavior of the blood at the neck and in the sac of the aneurysm. The blood flow simulation is used both for the validation of the model of flow diverter, and for the estimation of the Wall Shear Stresses along the wall of the aneurysms allowing in fine the modelling of the thrombosis phenomena.

 

 

The first results showed in the herein presented images are the result of several days of computing.

The challenge is now to optimize the time consuming in order to be able to provide medical doctor an interactive tool allowing the help in the choice of the diagnosis.

 

Stent zoom