Search Results for author: Gregor Koehler

Found 11 papers, 4 papers with code

PSFHS Challenge Report: Pubic Symphysis and Fetal Head Segmentation from Intrapartum Ultrasound Images

no code implementations17 Sep 2024 Jieyun Bai, ZiHao Zhou, Zhanhong Ou, Gregor Koehler, Raphael Stock, Klaus Maier-Hein, Marawan Elbatel, Robert Martí, Xiaomeng Li, Yaoyang Qiu, Panjie Gou, Gongping Chen, Lei Zhao, Jianxun Zhang, Yu Dai, Fangyijie Wang, Guénolé Silvestre, Kathleen Curran, Hongkun Sun, Jing Xu, Pengzhou Cai, Lu Jiang, Libin Lan, Dong Ni, Mei Zhong, Gaowen Chen, Víctor M. Campello, Yaosheng Lu, Karim Lekadir

This challenge aimed to enhance the development of automatic segmentation algorithms at an international scale, providing the largest dataset to date with 5, 101 intrapartum ultrasound images collected from two ultrasound machines across three hospitals from two institutions.

Segmentation

Improving Deep Learning Optimization through Constrained Parameter Regularization

1 code implementation15 Nov 2023 Jörg K. H. Franke, Michael Hefenbrock, Gregor Koehler, Frank Hutter

Unlike the uniform application of a single penalty, CPR enforces an upper bound on a statistical measure, such as the L2-norm, of individual parameter matrices.

Deep Learning Image Classification +2

RecycleNet: Latent Feature Recycling Leads to Iterative Decision Refinement

no code implementations14 Sep 2023 Gregor Koehler, Tassilo Wald, Constantin Ulrich, David Zimmerer, Paul F. Jaeger, Jörg K. H. Franke, Simon Kohl, Fabian Isensee, Klaus H. Maier-Hein

Using medical image segmentation as the evaluation environment, we show that latent feature recycling enables the network to iteratively refine initial predictions even beyond the iterations seen during training, converging towards an improved decision.

Decision Making Image Segmentation +3

MedNeXt: Transformer-driven Scaling of ConvNets for Medical Image Segmentation

1 code implementation17 Mar 2023 Saikat Roy, Gregor Koehler, Constantin Ulrich, Michael Baumgartner, Jens Petersen, Fabian Isensee, Paul F. Jaeger, Klaus Maier-Hein

This leads to state-of-the-art performance on 4 tasks on CT and MRI modalities and varying dataset sizes, representing a modernized deep architecture for medical image segmentation.

Decoder Image Segmentation +3

CRADL: Contrastive Representations for Unsupervised Anomaly Detection and Localization

no code implementations5 Jan 2023 Carsten T. Lüth, David Zimmerer, Gregor Koehler, Paul F. Jaeger, Fabian Isensee, Jens Petersen, Klaus H. Maier-Hein

By utilizing the representations of contrastive learning, we aim to fix the over-fixation on low-level features and learn more semantic-rich representations.

Contrastive Learning Unsupervised Anomaly Detection

Frequency Decomposition in Neural Processes

no code implementations1 Jan 2021 Jens Petersen, Paul F Jaeger, Gregor Koehler, David Zimmerer, Fabian Isensee, Klaus Maier-Hein

Neural Processes are a powerful tool for learning representations of function spaces purely from examples, in a way that allows them to perform predictions at test time conditioned on so-called context observations.

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