arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1804.02119cs.CVphysics.med-ph
收藏

超声图像重建方法对神经迁移学习乳腺病变分类的影响

Impact of ultrasound image reconstruction method on breast lesion classification with neural transfer learning

University of California, San Diego(加利福尼亚大学圣地亚哥分校);Institute of Fundamental Technological Research, Polish Academy of Sciences(波兰科学院基础技术研究所);Polish-Japanese Academy of Information Technology(波兰-日本信息技术学院);The Maria Skłodowska-Curie Memorial Cancer Centre and Institute of Oncology(玛丽·斯克洛多夫斯卡-居里纪念癌症中心和肿瘤研究所)

Michal Byra, Tomasz Sznajder, Danijel Korzinek, Hanna Piotrzkowska-Wroblewska, Katarzyna Dobruch-Sobczak, Andrzej Nowicki, Krzysztof Marasek

摘要:

深度学习算法,特别是卷积神经网络,已成为医学图像分析的首选方法。然而,最近在计算机视觉方面的研究表明,即使对输入图像强度进行很小的修改,也可能导致深度学习模型对图像进行不同的分类。在医学成像中,图像强度的分布与所应用的图像重建算法有关。在本文中,我们研究的影响,超声图像重建方法对乳腺病变分类与神经迁移学习。由于高动态范围,原始超声信号通常被压缩以便重建B模式图像。基于从乳腺病变获得的原始数据,我们使用不同的压缩水平重建B型图像。接下来,将迁移学习应用于分类。采用相干重建图像进行训练和评估。我们表明,重建算法的修改导致分类性能下降。作为补救措施,我们提出了一种数据增强的方法。我们表明,增强的训练集与不同的重建B模式图像导致更强大和有效的分类。我们的研究表明,重要的是要考虑到在计算机辅助诊断系统的发展过程中,在医疗扫描仪实现的图像重建算法。

英文摘要:

Deep learning algorithms, especially convolutional neural networks, have become a methodology of choice in medical image analysis. However, recent studies in computer vision show that even a small modification of input image intensities may cause a deep learning model to classify the image differently. In medical imaging, the distribution of image intensities is related to applied image reconstruction algorithm. In this paper we investigate the impact of ultrasound image reconstruction method on breast lesion classification with neural transfer learning. Due to high dynamic range raw ultrasonic signals are commonly compressed in order to reconstruct B-mode images. Based on raw data acquired from breast lesions, we reconstruct B-mode images using different compression levels. Next, transfer learning is applied for classification. Differently reconstructed images are employed for training and evaluation. We show that the modification of the reconstruction algorithm leads to decrease of classification performance. As a remedy, we propose a method of data augmentation. We show that the augmentation of the training set with differently reconstructed B-mode images leads to a more robust and efficient classification. Our study suggests that it is important to take into account image reconstruction algorithms implemented in medical scanners during development of computer aided diagnosis systems.

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。

↑