Constantin Ulrich
23 Papers
Constantin Ulrich is an academic researcher. The author has contributed to research in topics: Computer science & Engineering. The author has an hindex of 2, co-authored 5 publications.
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Papers
MedNeXt: Transformer-driven Scaling of ConvNets for Medical Image Segmentation
Saikat Sinha Roy,Gregor Köhler,Constantin Ulrich,Michael Baumgartner,Jens Petersen,Fabian Isensee,Paul F. Jaeger,Klaus H. Maier-Hein +7 more
TL;DR: MedNeXt as discussed by the authors is a Transformer-inspired large kernel segmentation network for medical image segmentation, which uses a 3D Encoder-Decoder network to preserve semantic richness across scales.
nnU-Net Revisited: A Call for Rigorous Validation in 3D Medical Image Segmentation
Fabian Isensee,Tassilo Wald,Constantin Ulrich,Michael Baumgartner,Saikat Roy,Klaus H. Maier-Hein,Paul F. Jaeger +6 more
TL;DR: The pursuit of novel architectures in 3D medical image segmentation often overshadows the importance of rigorous validation. Many recent claims fail to hold up when scrutinized for common validation shortcomings. The study finds that employing CNN-based U-Net models, using the nnU-Net framework, and scaling models to modern hardware resources achieve state-of-the-art performance.
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Transformer Utilization in Medical Image Segmentation Networks
Saikat Sinha Roy,Gregor Köhler,Michael Baumgartner,Constantin Ulrich,Jens Petersen,Fabian Isensee,Klaus H. Maier-Hein +6 more
TL;DR: Transformer Ablations as mentioned in this paper replace the Transformer blocks with plain linear operators to quantify the effectiveness of Transformers in medical image segmentation, and explore the replaceable nature of Transformer-learnt representations.
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Exploring new ways: Enforcing representational dissimilarity to learn new features and reduce error consistency
Tassilo Wald,Constantin Ulrich,Fabian Isensee,David Zimmerer,Gregor Köhler,Michael Baumgartner,Klaus H. Maier-Hein +6 more
TL;DR: This paper proposed to promote dissimilarity at different depths between architectures, with the goal of learning robust ensembles with disjoint failure modes, and showed that highly dissimilar intermediate representations result in less correlated output predictions and slightly lower error consistency, resulting in higher ensemble accuracy.
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Primus: Enforcing Attention Usage for 3D Medical Image Segmentation
Tassilo Wald,Saikat Roy,Fabian Isensee,Constantin Ulrich,Sebastian Ziegler,Dasha Trofimova,Raphael Stock,Michael Baumgartner,Gregor Köhler,Klaus H. Maier-Hein +9 more