Echo-POSED: Geometric Self-Distillation for Echocardiography Guidance

Elias Stenhede; Edvart Grüner Bjerke; Joanna Sulkowska; Eivind Bjørkan Orstad; Ole Jakob Elle; Ulysse Côté-Allard; Arian Ranjbar

arXiv · 2606.02634

Echo-POSED: Geometric Self-Distillation for Echocardiography Guidance

Elias Stenhede·Edvart Grüner Bjerke·Joanna Sulkowska·Eivind Bjørkan Orstad·Ole Jakob Elle·Ulysse Côté-Allard·Arian Ranjbar

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Abstract

We introduce Echo-POSED, a self-supervised framework for real-time transthoracic echocardiography (TTE) guidance that recommends probe adjustments directly from 2D ultrasound images, without the need for expert-labelled views or tracked probe trajectories. Instead, it trains on 2D views sliced from routinely acquired 3D echocardiography volumes, enforcing equivariance to probe motions while remaining invariant to cardiac phase, yielding a pose representation on $\mathrm{SO}(3)\times\mathrm{SO}(3)$. Across a held-out split and public external 3D--TTE datasets (including vendor shift), Echo-POSED maintains geometric consistency under virtual perturbations and enables intra- and inter-patient guidance simulations, achieving a combined mean angular error of 8.2 degrees between the guided and target views in intra-patient simulations with cardiac motion.

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BibTeX RIS

Elias Stenhede, Edvart Grüner Bjerke, Joanna Sulkowska, Eivind Bjørkan Orstad, Ole Jakob Elle, Ulysse Côté-Allard, Arian Ranjbar. 2026-05-30. Echo-POSED: Geometric Self-Distillation for Echocardiography Guidance. https://arxiv.org/abs/2606.02634

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