使用生成对抗网络增强健康大脑的磁共振图像
Sarah S Alrumiah1, Norah Alrebdi1, Dina M Ibrahim1,2
1Department of Information Technology, College of Computer, Qassim University, Buraydah, Saudi Arabia.
PeerJ. Computer science
|June 22, 2023
概括
用于医学成像的机器学习面临着数据稀缺. 这项研究使用生成对抗网络 (GAN) 来增强大脑MRI数据,但发现原始数据集产生了最高的分类准确性.
科学领域:
- 医学成像分析分析 医学成像分析
- 机器学习在医疗保健中的应用
- 放射学中的人工智能
背景情况:
- 医疗机器学习受到数据隐私问题的阻碍,导致数据集不足.
- 使用医学图像进行大脑瘤分类,面临着阶级不平衡问题,偏见模型.
- 公共可用的脑MRI数据集往往缺乏足够的"没有瘤"的例子.
研究的目的:
- 为了解决脑MRI数据集中的类失衡问题,特别是"没有瘤"类.
- 评估基于生成对抗网络 (GAN) 的增强技术与传统方法的有效性.
- 用VGG16对原始,增强和组合数据集进行分类性能比较.
主要方法:
- 使用生成对抗网络 (GAN) 变体,包括深度卷积网络 (DCGAN) 和单一网络 (SinGAN),用于数据增强.
- 实施传统的基于旋转的增强技术进行比较分析.
- 在五个不同的数据集上进行了VGG16分类实验:原始,DCGAN增强,SinGAN增强,组合GAN增强和旋转增强.
主要成果:
- 原始的,非增强数据集实现了最高的分类准确率73%.
- 单个GAN (SinGAN) 与深度卷积GAN (DCGAN) 相比表现出更高的性能,精度提高了4%.
- 非增强数据集显示了最高的分类损失,突出显示了阶级不平衡的负面影响.
结论:
- 虽然探索了基于GAN的增强,但原始数据集在这个特定的大脑MRI分类任务中表现最好.
- SinGAN显示出作为一个有效的增强策略的潜力,超过了DCGAN.
- 该研究强调了医学成像中阶级不平衡的挑战,并提供了对增强技术有效性的见解.
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