提出双流网络提升超声自由手扫描重建精度,实时给出可信度提示。
UltrasODM: A Dual Stream Optical Flow Mamba Network for 3D Freehand Ultrasound Reconstruction
- 双流架构融合光流与Mamba模块,提升6自由度位姿估计鲁棒性
- 相比基线模型,漂移降低15.2%,距离误差减少12.1%
- 支持医生反馈的可解释提示,适合临床超声辅助系统开发
临床超声采集高度依赖操作者,快速探头运动和亮度波动常导致重建误差,降低可信度与临床价值。我们提出UltrasODM,一种双流框架,通过每帧校准的不确定性、基于显著性的诊断和可操作提示,辅助超声医师采集。该框架集成三部分:(i) 对比排序模块,按运动相似性分组图像帧;(ii) 融合双Mamba时序模块的光流流,实现鲁棒的6-自由度位姿估计;(iii) 人机协同(HITL)层,结合贝叶斯不确定性、医生校准阈值及低置信区域显著图。当不确定性超过阈值,系统发出不干扰提示,建议重新扫描高风险区域或减慢扫查速度。在临床自由手超声数据集上评估,相较UltrasOM,UltrasODM将漂移降低15.2%,距离误差减少12.1%,豪斯多夫距离下降10.1%,并生成每帧不确定性与显著性输出。通过强调透明性与医生反馈,提升了重建可靠性,支持更安全、可信的临床工作流程。代码已公开于https://github.com/AnandMayank/UltrasODM。
原文摘要 · Abstract (English)
Clinical ultrasound acquisition is highly operator-dependent, where rapid probe motion and brightness fluctuations often lead to reconstruction errors that reduce trust and clinical utility. We present UltrasODM, a dual-stream framework that assists sonographers during acquisition through calibrated per-frame uncertainty, saliency-based diagnostics, and actionable prompts. UltrasODM integrates (i) a contrastive ranking module that groups frames by motion similarity, (ii) an optical-flow stream fused with Dual-Mamba temporal modules for robust 6-DoF pose estimation, and (iii) a Human-in-the-Loop (HITL) layer combining Bayesian uncertainty, clinician-calibrated thresholds, and saliency maps highlighting regions of low confidence. When uncertainty exceeds the threshold, the system issues unobtrusive alerts suggesting corrective actions such as re-scanning highlighted regions or slowing the sweep. Evaluated on a clinical freehand ultrasound dataset, UltrasODM reduces drift by 15.2%, distance error by 12.1%, and Hausdorff distance by 10.1% relative to UltrasOM, while producing per-frame uncertainty and saliency outputs. By emphasizing transparency and clinician feedback, UltrasODM improves reconstruction reliability and supports safer, more trustworthy clinical workflows. Our code is publicly available at https://github.com/AnandMayank/UltrasODM.
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