Author

Luca Guarnera

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Preprint Aug 2026

HexMIL: Hierarchical Attention MIL for Ante-Hoc Explainable Detection of AI-Manipulated CT Volumes

Hierarchical EXplainable Multiple Instance Learning (Hierarchical EXplainable Multiple Instance Learning), a mask-free medical deepfake detector that simultaneously addresses both limitations using only binary volume-level supervision.

Orazio Pontorno, Luca Guarnera, Z. Akhtar et al. · 0 citations

Jul 2026

The K-Space Signature: Frequency-Domain Representation Learning for Medical Deepfake Detection

The K-Space Signature (KSS) is introduced, a novel forensic framework that isolates hardware and generative traces within the spectral domain within the frequency domain and exhibits robust zero-shot generalization, maintaining strong discriminative power on independent datasets acquired from entirely unseen scanners.

Riccardo Raciti, Francesco Guarnera, F. Rundo et al. · arXiv.org · 0 citations