arXiv:2607.21186quant-phcs.AI2026-07

用经典模拟的量子模块改进卷积网络,医学图像分类中表现不逊于传统模型。

Do emulated quantum circuits change what CNNs look at? Performance and explainability comparison in medical image classification

论文配图:Do emulated quantum circuits change what CNNs look at? Performance and explainability comparison in medical image classification
图 1 · 摘自论文原文
  • 在卷积神经网络中嵌入经典模拟的量子模块,探索其对性能的影响。
  • 小数据集下量子启发模型表现更优,大数据集下传统模型精度更高。
  • 模型注意力区域均符合解剖结构,可解释性工具有效对比两者决策逻辑。

众多研究探讨了混合量子-经典卷积神经网络作为传统深度学习的有前景替代方案。然而,量子硬件上的网络组件存在根本性限制,且量子电路的可扩展性导致训练困难。本文系统研究小型经典模拟量子电路模块在复杂模型中的作用,提出一种混合量子启发卷积神经网络(HQiCNN),并与仅在中间层使用全连接层的参数匹配经典卷积网络(CNN)进行对比。两个模型在两个真实世界医学数据集上评估,系统调整超参数以确保公平比较。结果表明:无模型始终占优;HQiCNN在中等数据量下表现最佳,而CNN在最大训练集上准确率最高。移除纠缠后性能相当,但显著提升量子模拟可扩展性;更丰富的可观测量仅在数据充足时有益。最后,提出基于SHAP的两种可解释性工具(|SHAP|IoU与EMD_{pos}),证明两类模型均关注解剖学上合理的区域。本研究提供全面基准,显示在特定条件下,混合量子启发模型可为医学图像分类等实际任务带来优势。

原文摘要 · Abstract (English)

Numerous studies have analyzed the use of hybrid quantum-classical convolutional neural networks as a promising alternative to classical deep learning. However, network components on quantum hardware impose fundamental limitations, while the scalability of quantum circuits leads to trainability issues. In this work, we investigate whether small, classically-emulated quantum circuit components can play a meaningful role within complex models, offering an alternative to purely classical convolutional architectures. To this end, we present a systematic study of the effectiveness of a Hybrid Quantum-inspired Convolutional Neural Network (HQiCNN) compared with a parameter-matched classical Convolutional Neural Network (CNN) that differs only in an intermediate dense neural layer. Both models are evaluated on two real-world medical datasets while systematically varying the different hyperparameters, ensuring a fair model comparison that is both dataset and hyperparameter independent. The results show that no architecture consistently dominates the other: the HQiCNN achieves its largest gains in intermediate-data regimes, whereas the CNN reaches the highest accuracies for the largest training sets in both datasets. Furthermore, removing entanglement produces comparable performance while enabling substantially better scalability of quantum simulations, and richer observable sets become beneficial only when sufficient training data are available. Finally, we propose two SHAP-based explainability tools for comparing the predictions between both models, $|SHAP|$IoU and $EMD_{pos}$ metric, to demonstrate that both architectures consistently attend to anatomically plausible regions. Thus, we provide a comprehensive benchmark showing that, under certain conditions, hybrid quantum-inspired models are an alternative that can offer benefits in practical tasks such as medical image classification.

量子启发医学图像可解释性模型对比

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