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Abstract #2655

Improving automated aneurysm detection on multi-site MRA data: lessons learnt from a public machine learning challenge

Tommaso Di Noto1, Guillaume Marie1, Sebastien Tourbier1, Yasser Alemán-Gómez1,2, Oscar Esteban1, Guillaume Saliou1, Meritxell Bach Cuadra1,3, Patric Hagmann1, and Jonas Richiardi1
1Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, 2Center for Psychiatric Neuroscience, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, 3Medical Image Analysis Laboratory (MIAL), Centre d’Imagerie BioMédicale (CIBM), Lausanne, Switzerland

Machine learning challenges serve as a benchmark for determining state-of-the-art results in medical imaging. They provide direct comparisons between algorithms, and realistic estimates of generalization capability. By participating in the Aneurysm Detection And segMentation (ADAM) challenge, we learnt the most effective deep learning design choices to adopt when tackling automated brain aneurysm detection on multi-site data. Adjusting patch overlap ratio during inference, using a hybrid loss, resampling to uniform voxel spacing, using a 3D neural network architecture, and correcting for bias field were the most effective. We show that, when adopting these expedients, our model drastically improves detection performances.

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