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arXiv 2407.11219cs.CVeess.IV

TLRN: 用于大形变图像配准的时序潜在残差网络

TLRN: Temporal Latent Residual Networks For Large Deformation Image Registration

Department of Electrical and Computer Engineering, University of Virginia, USA(电气与计算机工程系,弗吉尼亚大学);Department of Computer Science, University of Virginia, USA(计算机科学系,弗吉尼亚大学)

Nian Wu, Jiarui Xing, Miaomiao Zhang

AI总结:

TLRN通过时序潜在残差网络实现大形变时间序列图像配准,提升配准精度。

摘要:

本文提出了一种新的方法,称为{\em 时序潜在残差网络(TLRN)},用于预测时间序列图像配准时的变形场序列。时间序列图像配准的挑战往往在于大运动的发生,尤其是在图像与参考图像差异显著时(例如,心脏周期的起始阶段与峰值拉伸阶段)。为了获得准确且稳健的配准结果,我们利用运动的连续性特性,并利用连续图像帧中的时间平滑性。我们提出的TLRN强调了一个具有精心设计的潜在变形空间残差块的时序残差网络,这些残差块由时间序列初始速度场参数化。我们将时间序列中的残差块视为一个动态训练系统,其中每个块设计为学习期望的变形特征与当前输入之间的残差函数,当前输入来自先前时间帧的累积。我们在合成数据和真实世界的心脏磁共振(CMR)图像视频上验证了TLRN的效果。我们的实验结果表明,与最先进的方法相比,TLRN能够显著提高配准精度。我们的代码在https://github.com/nellie689/TLRN上公开可用。

英文摘要:

This paper presents a novel approach, termed {\em Temporal Latent Residual Network (TLRN)}, to predict a sequence of deformation fields in time-series image registration. The challenge of registering time-series images often lies in the occurrence of large motions, especially when images differ significantly from a reference (e.g., the start of a cardiac cycle compared to the peak stretching phase). To achieve accurate and robust registration results, we leverage the nature of motion continuity and exploit the temporal smoothness in consecutive image frames. Our proposed TLRN highlights a temporal residual network with residual blocks carefully designed in latent deformation spaces, which are parameterized by time-sequential initial velocity fields. We treat a sequence of residual blocks over time as a dynamic training system, where each block is designed to learn the residual function between desired deformation features and current input accumulated from previous time frames. We validate the effectivenss of TLRN on both synthetic data and real-world cine cardiac magnetic resonance (CMR) image videos. Our experimental results shows that TLRN is able to achieve substantially improved registration accuracy compared to the state-of-the-art. Our code is publicly available at https://github.com/nellie689/TLRN.

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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