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arXiv 2505.03401cs.CVcs.AI
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DDaTR:用于纵向放射学报告生成的动态差异感知时间残差网络

DDaTR: Dynamic Difference-aware Temporal Residual Network for Longitudinal Radiology Report Generation

Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology(电子与计算机工程系,香港理工大学)

Shanshan Song, Hui Tang, Honglong Yang, Xiaomeng Li

AI总结:

本文提出DDaTR动态差异感知时间残差网络,通过DFAM、DDAM和动态残差传递建模跨检查空间与时间关联,在三个基准上提升RRG与LRRG性能。

摘要:

放射学报告生成(RRG)可根据医学影像自动生成放射学报告,从而提高报告流程的效率。纵向放射学报告生成(LRRG)扩展了 RRG,加入了比较当前检查与既往检查的能力,便于追踪临床发现随时间的变化。现有 LRRG 方法仅使用视觉预训练编码器从既往图像和当前图像中提取特征,随后将这些特征拼接以生成最终报告。然而,这些方法在特征提取过程中难以有效捕捉空间和时间相关性。因此,所提取的特征不能充分捕捉不同检查之间的差异信息,从而无法充分表示预期的病情进展,导致 LRRG 性能欠佳。为解决这一问题,我们开发了一种新颖的动态差异感知时间残差网络(DDaTR)。在 DDaTR 中,我们在视觉编码器的每个阶段引入两个模块,以捕捉多层次空间相关性。动态特征对齐模块(DFAM)旨在跨模态对齐既往特征,以保证既往临床信息的完整性。在丰富的既往特征提示下,动态差异感知模块(DDAM)通过识别不同检查之间的关系来捕捉有效的差异信息。此外,我们的 DDaTR 采用动态残差网络单向传递纵向信息,从而有效建模时间相关性。大量实验表明,该方法在三个基准上的性能优于现有方法,证明了其在 RRG 和 LRRG 任务中的有效性。

英文摘要:

Radiology Report Generation (RRG) automates the creation of radiology reports from medical imaging, enhancing the efficiency of the reporting process. Longitudinal Radiology Report Generation (LRRG) extends RRG by incorporating the ability to compare current and prior exams, facilitating the tracking of temporal changes in clinical findings. Existing LRRG approaches only extract features from prior and current images using a visual pre-trained encoder, which are then concatenated to generate the final report. However, these methods struggle to effectively capture both spatial and temporal correlations during the feature extraction process. Consequently, the extracted features inadequately capture the information of difference across exams and thus underrepresent the expected progressions, leading to sub-optimal performance in LRRG. To address this, we develop a novel dynamic difference-aware temporal residual network (DDaTR). In DDaTR, we introduce two modules at each stage of the visual encoder to capture multi-level spatial correlations. The Dynamic Feature Alignment Module (DFAM) is designed to align prior features across modalities for the integrity of prior clinical information. Prompted by the enriched prior features, the dynamic difference-aware module (DDAM) captures favorable difference information by identifying relationships across exams. Furthermore, our DDaTR employs the dynamic residual network to unidirectionally transmit longitudinal information, effectively modelling temporal correlations. Extensive experiments demonstrated superior performance over existing methods on three benchmarks, proving its efficacy in both RRG and LRRG tasks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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