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arXiv 2410.22365eess.IVcs.AIcs.CV

使用深度学习对功能性超声图像进行血管分割

Vascular Segmentation of Functional Ultrasound Images using Deep Learning

AIstroSight;Inria(法国国家信息与自动化技术研究院);Hospices Civils de Lyon(里昂慈善医院);University Claude Bernard Lyon 1(里昂第一大学);Lyon Neuroscience Research Center(里昂神经科学研究中心)

Hana Sebia, Thomas Guyet, Mickaël Pereira, Marco Valdebenito, Hugues Berry, Benjamin Vidal

AI总结:

本文提出首个基于深度学习的fUS血管分割工具,利用ULM自动标注训练UNet,仅需100帧即可区分动静脉并量化动态CBV,且可从静息态泛化到视觉刺激。

摘要:

医学图像分割是一项具有众多应用的基础任务。尽管MRI、CT和PET成像模态已显著受益于深度学习分割技术,但诸如功能性超声(fUS)等较新的模态却进展有限。fUS是一种非侵入性成像方法,能够以高时空分辨率测量脑血容量(CBV)的变化。然而,由于同一像素内存在相反的血流方向,在fUS中区分小动脉和小静脉颇具挑战。超声定位显微术(ULM)可通过追踪微泡造影剂来增强分辨率,但其具有侵入性,且缺乏动态CBV量化能力。本文提出首个基于深度学习的fUS图像分割工具,该工具基于ULM自动标注,能够区分来自不同血管区室的信号,并实现动态CBV量化。我们在大鼠大脑fUS图像上评估了多种UNet架构,仅使用fUS图像栈中的100个时间帧,便取得了具有竞争力的分割性能:准确率90%、F1分数71%、IoU为0.59。这些结果与其他成像模态中管状结构分割的结果相当。此外,在静息态数据上训练的模型能够很好地泛化至视觉刺激期间采集的图像,凸显了其鲁棒性。本工作为ULM提供了一种非侵入性且具有成本效益的替代方案,增强了fUS数据解释,并增进了对血管功能的理解。我们的流程在皮层和更深层区域中,预测区室与实际区室的信号之间均表现出很高的线性相关系数,展示了其准确捕捉血流动力学的能力。

英文摘要:

Segmentation of medical images is a fundamental task with numerous applications. While MRI, CT, and PET modalities have significantly benefited from deep learning segmentation techniques, more recent modalities, like functional ultrasound (fUS), have seen limited progress. fUS is a non invasive imaging method that measures changes in cerebral blood volume (CBV) with high spatio-temporal resolution. However, distinguishing arterioles from venules in fUS is challenging due to opposing blood flow directions within the same pixel. Ultrasound localization microscopy (ULM) can enhance resolution by tracking microbubble contrast agents but is invasive, and lacks dynamic CBV quantification. In this paper, we introduce the first deep learning-based segmentation tool for fUS images, capable of differentiating signals from different vascular compartments, based on ULM automatic annotation and enabling dynamic CBV quantification. We evaluate various UNet architectures on fUS images of rat brains, achieving competitive segmentation performance, with 90% accuracy, a 71% F1 score, and an IoU of 0.59, using only 100 temporal frames from a fUS stack. These results are comparable to those from tubular structure segmentation in other imaging modalities. Additionally, models trained on resting-state data generalize well to images captured during visual stimulation, highlighting robustness. This work offers a non-invasive, cost-effective alternative to ULM, enhancing fUS data interpretation and improving understanding of vessel function. Our pipeline shows high linear correlation coefficients between signals from predicted and actual compartments in both cortical and deeper regions, showcasing its ability to accurately capture blood flow dynamics.

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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