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Fabian Drexel

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#machine learning Preprint Oct 2026

The Predictability Bias of Joint-Embedding Predictive Learning in Medical Imaging

TAP-JEPA is introduced, a ViT-B/3D trained on 113,611 CT volumes that is competitive with state-of-the-art encoders in scan-level classification and shows that contextual predictability is not a sufficient proxy for clinical relevance in medical representation learning.

F. Drexel, B. Kainz, J. Kather et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Autonomous Structuring of Radiology Reports Across Modalities at Archive Scale Using an Open-Weight Large Language Model

Purpose: To develop and evaluate an open-weight large language model (LLM) pipeline that converts an entire archive of free-text radiology reports into structured reports without human oversight. Materials and Methods: In this retrospective study, a pipeline with 150 hierarchically organized templates was developed at...

Friedrich Puttkammer, F. Drexel, Marlene Fritzsche et al. · 0 citations
Preprint Jul 2026

RadPRISM: Schema-stratified radiology-report supervision for concept-disentangled image representations and visual grounding

RadPRISM makes a clinician-defined radiology schema a designated stratification axis: an on-premise large language model extracts per-concept text spans from free-text reports, and each clinical concept is aligned in its own dedicated visual subspace, turning concept stratification into direct, top-level alignment supe...

Fabian Drexel, Marlene Fritzsche, Era Stambollxhiu et al. · 0 citations

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