基于深度学习方法的MRI图像脑肿瘤分割

IF 0.4 Q4 MATHEMATICS, APPLIED
E. Shchetinin
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引用次数: 0

摘要

脑肿瘤的分割是医学图像分析中最困难的任务之一。脑肿瘤分割的目的是建立一个准确的脑肿瘤区域轮廓。神经胶质瘤是最常见的脑肿瘤。对本病患者的诊断是基于对磁共振成像结果的分析和对肿瘤边界的人工分割。然而,由于人工分割过程耗时且容易出错,因此需要一种快速可靠的自动分割算法。近年来,深度学习方法在解决各种计算机视觉问题(如图像分类、目标检测和语义分割)方面显示出了良好的效果。许多基于深度学习的方法已被应用于脑肿瘤的分割,并取得了可喜的结果。本文提出了一种基于U-Net架构的基于脑肿瘤MRI图像的混合分割方法,该方法的编码器采用在一组ImageNet图像上预训练的深度卷积神经网络模型。其中使用了VGG16、VGG19、MobileNetV2、Inception、ResNet50、EfficientNetb7、InceptionResnetV2、DenseNet201、DenseNet121。在混合方法的基础上,实现了TL-U-Net模型,并进行了数值实验,对其进行了不同编码器模型的训练,用于基于MRI图像的脑肿瘤分割。在一组大脑MRI图像上的计算机实验表明了所提出方法的有效性,最佳编码器模型为神经网络Densenet121,其分割精度指标MeanIoU=90.34%, MeanDice=94.33%,准确率=94.17%。所得的分割精度估计值可与其他研究人员获得的相似估计值相媲美或超过。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On segmentation of brain tumors by MRI images with deep learning methods
Segmentation of a brain tumor is one of the most difficult tasks in the analysis of medical images. The purpose of brain tumor segmentation is to create an accurate outline of brain tumor areas. Gliomas are the most common type of brain tumors. Diagnosis of patients with this disease is based on the analysis of the results of magnetic resonance imaging and segmentation of the tumor boundaries manually. However, due to the time-consuming nature of the manual segmentation process and errors, there is a need for a fast and reliable automatic segmentation algorithm. In recent years, deep learning methods have shown promising effectiveness in solving various computer vision problems, such as image classification, object detection and semantic segmentation. A number of methods based on deep learning have been applied to segmentation of brain tumors, and promising results have been achieved. The article proposes a hybrid method for solving the problem of segmentation of brain tumors based on its MRI images based on the U-Net architecture, the encoder of which uses a model of a deep convolutional neural network pre-trained on a set of ImageNet images. Among such models were used VGG16, VGG19, MobileNetV2, Inception, ResNet50, EfficientNetb7, InceptionResnetV2, DenseNet201, DenseNet121. Based on the hybrid method, the TL-U-Net model was implemented, and numerical experiments were carried out to train it with different encoder models for segmentation of brain tumors based on its MRI images. Computer experiments on a set of MRI images of the brain showed the effectiveness of the proposed approach, the best encoder model turned out to be the neural network Densenet121, which provided indicators of segmentation accuracy MeanIoU=90.34%, MeanDice=94.33%, accuracy=94.17%. The obtained estimates of segmentation accuracy are comparable or exceed similar estimates obtained by other researchers.
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