Computational Fluid Dynamics Challenge for rupture-prediction in intracranial aneurysms


In the recent years various simulation challenges have been organized in order to check the applicability of the computational hemodynamics for intracranial aneurysms. Radaelli et al. [1] performed a comparison for virtually stented patient-specific cases using flow diverters. Steinman et al. [2] compared the velocity and pressure values obtained by various groups in a giant aneurysm. One of the main difficulties when performing computational fluid dynamics (CFD) for patient-specific cases is the prediction of the rupture probability.

The current challenge involves two patient-specific MCA-aneurysms that should be analyzed by CFD in a blind test. One of the provided data sets corresponds to a ruptured aneurysm, while the other one can be considered as unruptured. The ruptured case is documented with intra-operative video recording. Therefore, the exact ruptured site of the aneurysm is known.

The reconstructed surface geometries will be provided after sending an e-mail to

The participants are free to choose their computational model, software, boundary condition etc.

The participants are also free to use any criteria to analyze the obtained solutions with a view to rupture prediction. It is expected that the participants should predict: 1) which one was the ruptured aneurysm based on their computational results; 2) at which location the rupture took place.


Phase I (Deadline - August 16, 2013):

The participants should prepare a half-page abstract describing their computational software, applied boundary condition and further assumptions. The abstract should contain information about the expected outcome of the computational study, trying to predict the ruptured aneurysm and rupture site.

The participants will be asked to submit their computational results of the wall-shear stress along the aneurysm wall for both cases. They will be used to compare the different computational results.

Phase II (Deadline - September 13, 2013):

The participants will be asked to repeat their computational study with prescribed boundary conditions. Therefore, no new volume mesh generation is necessary. Phase II will be used to check the variability of the computational results within the different groups.

The participants will again be asked to submit their computational results concerning wall-shear stress for the sake of comparison.

Website of the challenge:

Contact: Dr. Gabor Janiga,            janiga _at_

Depending on the success of the challenge a joint journal publication will be prepared based on the results.