可解释的机器学习模型来分类罪祸首 - - 化 Carotid 斑块在不确定的来源的栓塞性中风
Yu Sakai1, Jiehyun Kim2, Huy Q Phi3
1Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
概括
机器学习模型可以比传统方法更好地识别未确定源 (ESUS) 栓塞性中风中的罪祸首 - 带斑块. 可解释的人工智能 (SHAP) 揭示了改善中风风险评估的关键斑块特征.
科学领域:
- 神经学 神经学
- 心血管医学 心血管医学
- 人工智能的人工智能
背景情况:
- 源不明的栓塞性中风 (ESUS) 与动脉斑块有关,即使有<50%的狭窄.
- 斑块脆弱性受到斑块内出血 (IPH),富含脂质的死核,周周脂肪组织 (PVAT) 和化的影响.
- 传统的斑块评估缺乏可解释性,特别是机器学习 (ML) 模型.
研究的目的:
- 应用一种可解释的ML方法,使用SHapley添加物扩展 (SHAP) 来分类罪祸首与非罪祸首的带斑块.
- 为了确定主要的斑块和化特征预测中风因果关系.
- 为了提高ML模型在中风预测中的临床解释性.
主要方法:
- 对单边前部循环ESUS患者的回顾性分析,这些患者在CT血管学上有化动脉斑块.
- 提取化级别和斑块级别的特征,包括PVAT体积.
- 八个ML分类器的基准测试,使用梯度增强决策树 (CatBoost) 调整并使用SHAP解释.
主要成果:
- 使用五个斑块/化特征的ML模型实现了ROC-AUC0.79,优于斑块厚度 (0.59) 和IPH存在 (0.51).
- SHAP分析发现斑块厚度 (>2.6毫米) 和PVAT体积 (≥112毫米3) 是最有影响力的特征.
- 该模型证明了罪祸首化动脉斑块的优越分类准确性.
结论:
- 结合非化斑块和化特征的ML模型可以在ESUS中更好地分类罪祸首的喉斑块.
- 可解释的ML (SHAP) 提供了可临床解释的见解,并建议斑块脆弱性的潜在门.
- 这种方法增强了对与栓塞性中风相关的斑块特征的理解.
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