Dynamic Temporal-Guided Diffusion Model for Pathological Image Classification

ZHAO Heyang; CHEN Ruhao; LUO Yikai; ZHANG Peng; WANG Wenjian

doi:10.12263/DZXB.20251079

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Dynamic Temporal-Guided Diffusion Model for Pathological Image Classification

PAPERS | 更新时间：2026-07-30

- Dynamic Temporal-Guided Diffusion Model for Pathological Image Classification
- ACTA ELECTRONICA SINICA Vol. 54, Issue 4, Pages: 1705-1718(2026)
- 作者机构：
  
  1.山西大学计算机与信息技术学院，山西太原 030006
  2.山西大学计算智能与中文信息处理教育部重点实验室，山西太原 030006
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62506220;62476157;U21A20513);Fundamental Research Program of Shanxi Province(202403021222024);Special Project for Patent Transformation in Shanxi Province(20250016);Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2024L002)
- DOI：10.12263/DZXB.20251079
  CLC： TP391.41;R361.3
- Received：21 January 2026，
  
  Accepted：25 March 2026，
  
  Online First：09 May 2026，
  
  Published：25 April 2026
- 稿件说明：
移动端阅览
赵赫阳, 陈如豪, 罗一恺, 等. 动态时序引导的病理图像分类扩散模型[J]. 电子学报, 2026, 54(04): 1705-1718.

ZHAO Heyang, CHEN Ruhao, LUO Yikai, et al. Dynamic Temporal-Guided Diffusion Model for Pathological Image Classification[J]. Acta Electronica Sinica, 2026, 54(04): 1705-1718.
赵赫阳, 陈如豪, 罗一恺, 等. 动态时序引导的病理图像分类扩散模型[J]. 电子学报, 2026, 54(04): 1705-1718. DOI：10.12263/DZXB.20251079

ZHAO Heyang, CHEN Ruhao, LUO Yikai, et al. Dynamic Temporal-Guided Diffusion Model for Pathological Image Classification[J]. Acta Electronica Sinica, 2026, 54(04): 1705-1718. DOI：10.12263/DZXB.20251079

摘要

基于深度学习的病理图像分类是实现高效、可靠病理辅助诊断的关键技术基础，对病理图像智能分析、病变区域精准识别与组织类型自动判别具有重要研究意义。当前主流病理图像分类方法多依赖单一时间点的静态特征提取，难以有效表征病理状态从正常、发育异常到恶性转化的连续演进过程，无法充分建模组织层面复杂的层级结构与空间分布特征，导致对相似病理区域、细微病变结构的识别能力存在明显局限，模型判别精度与泛化性能难以进一步提升。针对上述问题，本文提出一种动态时序引导的病理图像分类扩散模型（Dynamic Temporal-guided Diffusion for Pathology， DT-DPath），构建统一的病理图像分类框架。该模型以扩散模型为基础，将前向加噪与

反向去噪过程模拟为组织形态学的退化与重构过程，通过聚合扩散过程中不同噪声水平下的时序动态特征，构建能够刻画病理演化过程的判别性表征，精准捕捉细胞层面的细微结构差异，并有效建模组织内部的复杂层级与空间分布关系。在特征提取阶段，本文设计时序动态通道注意力机制（Temporal Dynamic Channel Attention，TDCA），将通道注意力扩展至时序维度，自适应聚焦于关键时序阶段的特征响应，增强模型对时序演化信息的表征能力。为优化训练效率，本文采用基于时序贡献的非均匀重要性采样策略，依据各时间步的分类显著性与信息密度动态构建采样分布，优先保留高判别力的中间去噪阶段，在保持分类性能的同时显著提升模型训练速度与稳定性。实验在结直肠癌、乳腺癌及淋巴结转移等多种病理图像公开数据集上开展，与CNN（Convolutional Neural Networks）、Transformer、扩散模型分类器以及病理基础模型等当前先进方法对比，结果表明DT-DPath在分类准确率、精确率、召回率及

分数等指标上全面领先，性能提升了0.65~3.59个百分点。消融实验验证了时序动态通道注意力与非均匀重要性采样的有效性，可视化分析显示模型可精准聚焦病理判别关键区域，特征聚类效果显著优于传统方法。本文方法实现了从静态特征建模到动态时序演化表征的范式转变，为病理图像智能分类提供了新的技术路径，也为扩散模型在病理图像分析领域的应用提供了可解释的研究思路。

Abstract

Deep learning-based pathological image classification is a key technical foundation for efficient and reliable computer-aided pathological analysis

which is of great significance for intelligent analysis of pathological images

accurate identification of lesion regions and automatic discrimination of tissue types. Current mainstream pathological image classification methods mostly rely on static feature extraction at a single time point

which makes it difficult to effectively represent the continuous evolution process of pathological states from normal

developmental abnormalities to malignant transformation

and cannot fully model the complex hierarchical structure and spatial distribution features at the tissue level. As a result

the recognition ability for similar pathological regions and subtle lesion structures is obviously limited

and the discrimination accuracy and generalization performance of the model are difficult to further improve. To address the above issues

this paper proposes a dynamic temporal-guided diffusion model for pathology (DT-DPath)

which constructs a unified classification framework for pathological images. Based on the diffusion model

this framework simulates the forward noise addition and reverse denoising processes as the degradation and reconstruction of tissue

morphology. By aggregating temporal dynamic features at different noise levels during the diffusion process

it constructs discriminative representations that depict the pathological evolution process

accurately captures subtle structural differences at the cellular level

and effectively models the complex hierarchical and spatial distribution relationships within tissues. In the feature extraction stage

this paper designs a temporal dynamic channel attention (TDCA) mechanism

which extends channel attention to the temporal dimension and adaptively focuses on feature responses at key temporal stages to enhance the model’s ability to represent temporal evolution information. To optimize training efficiency

a non-uniform importance sampling strategy based on temporal contribution is adopted

which dynamically constructs the sampling distribution according to the classification saliency and information density of each time step

and preferentially retains intermediate denoising stages with high discriminative power. This strategy significantly improves training speed and stability while maintaining classification performance. Experiments are conducted on a variety of public pathological image datasets including colorectal cancer

breast cancer and lymph node metastasis. Compared with state-of-the-art methods such as CNN

Transformer

diffusion model classifiers and pathological foundation models

the results show that DT-DPath achieves comprehensive superiority in accuracy

precision

recall and

-score

with performance improvements ranging from 0.65~3.59 percentage points. Ablation experiments verify the effectiveness of temporal dynamic channel attention and non-uniform importance sampling

and visualization analysis shows that the model can accurately focus on key regions for pathological discrimination

with significantly better feature clustering effects than traditional methods. The proposed method realizes the paradigm shift from static feature modeling to dynamic temporal ev

olution representation

provides a new technical path for intelligent classification of pathological images

and also offers an interpretable research idea for the application of diffusion models in the field of pathological image analysis.

关键词

Keywords

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