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Klaus Maier-Hein

3 papers indexed

arxivcs.LGcs.CLcs.CR2026-07-15

Privacy Leakage in Federated Learning in Radiology Reports: A Comparative Evaluation of Tokenizer-Driven Privacy Risks

Santhosh Parampottupadam, Andres Martinez, Dimitrios Bounias, Sinem Sav, Klaus Maier-Hein, Ralf Floca

Federated learning (FL) enables multi-institutional training on clinical text without sharing raw data, but gradient inversion can reconstruct sensitive information from shared model updates. The extent of this leakage for radiology reports, and the role of tokenizer design, rema…

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arxiveess.IVcs.CVphysics.med-ph2026-07-04

GLOW-FDG: Generalized cancer LesiOn Whole-body segmentation model for $^{18}$F-FDG-PET/CT

Maksym Fritsak, Maximilian Rokuss, Hubert S. Gabryś, Yannick Kirchhoff, Benjamin Hamm, Sebastian M. Christ, et al.

Whole-body fluorodeoxyglucose positron emission tomography combined with computed tomography is widely used in cancer care, but manual lesion delineation is slow, subjective, and difficult to scale. We present GLOW-FDG, an open-source artificial intelligence model for whole-body…

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arxivcs.CVcs.LG2026-07-02

Rethinking Post-Hoc Calibration in Semantic Segmentation

Tristan Kirscher, Kim-Celine Kahl, Balint Kovacs, Maximilian R. Rokuss, Klaus Maier-Hein, Xavier Coubez, et al.

Reliable confidence estimates are essential in semantic segmentation, especially in safety-critical settings where overconfident errors can mislead downstream decisions. Yet modern segmentation models often remain miscalibrated. Post-hoc calibration offers a practical way to corr…

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