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arXiv 1903.02871cs.CV
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利用全自动低级分段PET数据,为相应的CT数据训练高级深度学习算法

Exploit fully automatic low-level segmented PET data for training high-level deep learning algorithms for the corresponding CT data

Christina Gsaxner, Peter M. Roth, Jürgen Wallner, Jan Egger

摘要:

本文提出了一种基于人工神经网络的CT图像膀胱自动分割方法。自动医学图像分析已成为疾病不同治疗阶段的宝贵工具。特别是医学图像分割起着至关重要的作用,因为分割通常是图像分析流程中的初始步骤。由于深度神经网络在过去几年中对图像处理领域产生了很大的影响,我们使用两种不同的深度学习架构来分割膀胱。这两种架构都基于预先训练的分类网络,这些网络适于执行语义分割。由于深度神经网络需要大量的训练数据,特别是图像和相应的地面实况标签,我们还提出了一种方法来从正电子发射断层扫描/计算机断层扫描图像数据生成这样一个合适的训练数据集。这是通过对正电子发射断层扫描数据应用阈值处理以获得地面实况并通过利用数据增强来扩大数据集来完成的。在这项研究中,我们讨论了数据增强对分割结果的影响,并比较和评估所提出的架构的定性和定量分割性能。在这项研究中提出的结果可以得出结论,深神经网络可以被认为是一种有前途的方法来分割CT图像中的膀胱。

英文摘要:

We present an approach for fully automatic urinary bladder segmentation in CT images with artificial neural networks in this study. Automatic medical image analysis has become an invaluable tool in the different treatment stages of diseases. Especially medical image segmentation plays a vital role, since segmentation is often the initial step in an image analysis pipeline. Since deep neural networks have made a large impact on the field of image processing in the past years, we use two different deep learning architectures to segment the urinary bladder. Both of these architectures are based on pre-trained classification networks that are adapted to perform semantic segmentation. Since deep neural networks require a large amount of training data, specifically images and corresponding ground truth labels, we furthermore propose a method to generate such a suitable training data set from Positron Emission Tomography/Computed Tomography image data. This is done by applying thresholding to the Positron Emission Tomography data for obtaining a ground truth and by utilizing data augmentation to enlarge the dataset. In this study, we discuss the influence of data augmentation on the segmentation results, and compare and evaluate the proposed architectures in terms of qualitative and quantitative segmentation performance. The results presented in this study allow concluding that deep neural networks can be considered a promising approach to segment the urinary bladder in CT images.

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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