基于GPU的模糊c均值并行实现纹理特征提取脑肿瘤分割

Sanjay Saxena, Suraj Shama
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引用次数: 3

摘要

脑肿瘤的精确分割是医学图像处理和分析的重要任务之一,因为它涉及到从脑MRI序列中提取肿瘤区域的信息。由于脑肿瘤的纹理、大小、形状和位置等原因,对脑肿瘤进行自动分割和检测是一个迫切需要解决的问题。本文提出了一种从FLAIR MRI序列中分割脑肿瘤的重要方法,即对局部窗口进行分类,然后进行并行模糊c均值聚类。在多个医学图像处理应用中,模糊c-均值方法在提取各种目标方面表现出了良好的效率。然而,这些算法的主要问题之一是在处理大数据集时计算量要求高。如今,NVIDIA的GPU在实现这种耗时的算法以降低时间复杂度方面发挥着极其重要的作用。我们基于NCI-MICCAI BRATS 2017 FLAIR MRI的HGG(高级别胶质瘤)实验证明了所实现的并行算法的有效性。对于肿瘤区域的分割,在CPU(主机)上实现滑动窗口机制,采用45 × 45大小的窗口对该特定窗口是否存在肿瘤区域进行分类。为了在GPU(设备)侧进行完美分割,使用模糊c均值技术获得肿瘤的准确位置。对于BRATS数据集,该算法在CPU上的实现速度约为17.6。在提高分割速度的同时,得到了显著的骰子相似系数,表明在合理的时间内分割是有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Brain Tumor Segmentation by Texture Feature Extraction with the Parallel Implementation of Fuzzy C-Means using CUDA on GPU
Exact segmentation of the brain tumor is one of the imperative tasks in medical image processing and its analysis as it deals with extracting the information of the tumorous region from the brain MRI sequences. Automated segmentation and detection of brain tumors from the brain MRI is an exigent issue caused by the texture, size, shape, and location. In this paper, a significant method of brain tumor segmentation from the FLAIR MRI sequences is by classifying local window followed by parallel fuzzy c means clustering. Fuzzy c-means methods have shown their efficiency in extracting a variety of objects in several medical image processing applications. However, one of the major issues of these algorithms is high computational requirements at the time of dealing with large data set. Nowadays, NVIDIA's GPU plays an extremely essential role in implementing such time-consuming algorithms to reduce the time complexity. Our experiments based on NCI-MICCAI BRATS 2017 FLAIR MRI of HGG (High-Grade Glioma) demonstrate the efficiency of the implemented parallel algorithm. For the segmentation of tumorous region, a mechanism of sliding window is implemented on CPU (host) in which a 45 × 45 sized window is taken to classify whether that particular window is having tumor region or not. For perfect segmentation at the GPU (device) side, fuzzy c means technique is used to get the exact location of the tumor. Approx 17.6 speed up obtained, for the BRATS data sets over the implementation of the algorithm on CPU. Apart from speed up significant dice similarity coefficients are obtained which shows the efficient segmentation in the reasonable time.
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