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arXiv 1806.07589cs.CV
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基于卷积神经网络的脑胶质瘤MRI计算机辅助诊断系统

A CADe System for Gliomas in Brain MRI using Convolutional Neural Networks

Indian Statistical Institute(印度统计研究所);DAV Institute of Engineering and Technology(DAV工程技术学院)

Subhasis Banerjee, Sushmita Mitra, Anmol Sharma, B. Uma Shankar

摘要:

受卷积神经网络(CNN)成功的启发,我们开发了一种新的计算机辅助检测(CADe)系统,使用CNN从多通道MRI数据中检测和分割多形性胶质母细胞瘤(GBM)。两阶段方法首先识别GBM的存在。随后在每个“异常”MR切片中进行GBM定位。作为CADe系统的一部分,采用两种CNN架构,即分类CNN(C-CNN)和检测CNN(D-CNN)。CADe系统将由四个序列($T_1$、$T_{1c},$、$T_2$和$T_{2FLAIR}$)组成的MRI数据视为输入,并自动生成包含每个切片中被视为异常的肿瘤区域的边界框。实验结果表明,所提出的CADe系统,当用作分割前的初步步骤时,可以允许改进的肿瘤区域的描绘,同时减少在大脑的正常区域中出现的假阳性。用于肿瘤分割的GrowCut方法通常需要前景和背景种子区域进行初始化。在这里,该算法的初始化种子自动生成的建议CADe系统的输出,从而导致在改进的性能相比,使用随机种子。

英文摘要:

Inspired by the success of Convolutional Neural Networks (CNN), we develop a novel Computer Aided Detection (CADe) system using CNN for Glioblastoma Multiforme (GBM) detection and segmentation from multi channel MRI data. A two-stage approach first identifies the presence of GBM. This is followed by a GBM localization in each "abnormal" MR slice. As part of the CADe system, two CNN architectures viz. Classification CNN (C-CNN) and Detection CNN (D-CNN) are employed. The CADe system considers MRI data consisting of four sequences ($T_1$, $T_{1c},$ $T_2$, and $T_{2FLAIR}$) as input, and automatically generates the bounding boxes encompassing the tumor regions in each slice which is deemed abnormal. Experimental results demonstrate that the proposed CADe system, when used as a preliminary step before segmentation, can allow improved delineation of tumor region while reducing false positives arising in normal areas of the brain. The GrowCut method, employed for tumor segmentation, typically requires a foreground and background seed region for initialization. Here the algorithm is initialized with seeds automatically generated from the output of the proposed CADe system, thereby resulting in improved performance as compared to that using random seeds.

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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