用心脏数字孪生模型,非侵入式精准定位心梗区域。
Physiology and Anatomy Aware Inverse Inference of Myocardial Infarction for Cardiac Digital Twin

- 结合解剖与生理信息生成真实心梗疤痕,模拟缺血进程。
- 在心电图-心梗关系上达到0.7391的分割准确率(Dice)。
- 适合心脏病研究与个性化诊疗,提升结果可解释性。
心肌梗死准确定位对风险分层至关重要。尽管LGE-MRI仍是金标准,但其资源消耗大。结合电影MRI与心电图可更细致表征梗死特征。现有逆向推断方法忽略真实瘢痕形态与心室复极化特性,降低了对细微心电图变化的敏感性,且难以解释梗死引起的电生理变化。本文提出一种基于心脏数字孪生的无创心梗定位新框架。为弥合仿真与现实之间的域差距,引入解剖感知的随机瘢痕生成策略,合成具有边界区的不规则瘢痕,模拟缺血性全层进展过程。随后构建虚拟队列以生成QRS-T波形,捕捉去极化与复极化动态。进一步设计了生理与解剖感知网络(PAA-Net),联合编码三维心肌几何结构与多导联心电图,实现对不同位置、大小、空间范围和透壁性心梗区域的推断。实验表明,该框架在逆向推断性能上显著优于现有方法,心梗与边界区分割的Dice分数分别为0.7391和0.5503,同时提升了心电图-心梗关系的可解释性。代码将在录用后公开。
原文摘要 · Abstract (English)
Accurate localization of myocardial infarction is essential for risk stratification. While LGE-MRI remains the gold standard, it is resource-intensive. Integrating cine MRI with ECG enables a more detailed representation of infarct properties. Existing inverse MI inference methods overlook realistic scar morphology and cardiac repolarization, reducing sensitivity to subtle ECG variations and interpretability of infarct-induced electrophysiological changes. In this paper, we propose a novel framework for noninvasive MI localization using cardiac digital twins. To bridge the domain gap between simulation and reality, we introduce an anatomy-aware stochastic infarct synthesis strategy to synthesize realistic, irregular scars with border zones, mimicking ischemic transmural progression. We then construct a virtual cohort to simulate QRS-T waveforms, capturing both depolarization and repolarization dynamics. Furthermore, we design a Physiology and Anatomy Aware Network (PAA-Net) that jointly encodes 3D myocardial geometry and multi-lead ECGs to infer infarct areas with varying localizations, sizes, spatial extents, and transmuralities. Experimental results demonstrate that our framework significantly outperforms existing methods in inverse inference, achieving Dice scores of 0.7391 and 0.5503 for scar and border zone segmentation, respectively, while further enhancing the interpretability of the ECG-infarct relationship. Our code will be released upon acceptance.
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