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arXiv · 2610.34214

StaX-Net: Stackelberg Interleaved Asymmetric Network for Cross-Modality Medical Image Translation

Amin Golnari·Saeid Sanei
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Abstract

Cross-modality medical image translation is challenged by anatomically inconsistent synthesis that can compromise clinical diagnosis. We propose StaX-Net, a Stackelberg interleaved asymmetric network that incorporates a partially coupled encoder-discriminator structure, and a 2D feature aggregation and spatial transformation (FAST) layer that distills target-supervised priors under the learning using privileged information paradigm. The shared blocks between the generator and discriminator enhance architectural feature alignment. To stabilize the leader-follower training, a Stackelberg-inspired asymmetric optimization scheme employs explicit shared-parameter freezing and asymmetric learning rates. The FAST layer distills target-domain priors during training and applies a source-only transform at inference. This constrains the synthesis process through target-informed feature representations relative to standard generative architectures. The code is available on GitHub for public use.

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BibTeXRIS

Amin Golnari, Saeid Sanei. 2026-10-25. StaX-Net: Stackelberg Interleaved Asymmetric Network for Cross-Modality Medical Image Translation. https://arxiv.org/abs/2610.34214

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