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在胎儿超声波成像中使用对比学习进行标准平面分类
Giovanna Migliorelli1, Maria Chiara Fiorentino2, Mariachiara Di Cosmo2
1Department of Law, Università degli Studi di Macerata, Macerata, Italy.
Computers in biology and medicine
|April 13, 2024
概括
对比式学习,特别是SimCLR,有效地减少了对胎儿标准平面识别中的大型注释超声数据集的需求,特别是在低跨类可变性任务中.
科学领域:
- 医疗成像医学成像
- 机器学习 机器学习
- 计算机视觉 计算机视觉
背景情况:
- 用于胎儿标准平面识别的超声波 (美国) 图像数据集通常很小,缺乏广泛的注释.
- 开发有效的机器学习模型通常需要大型标记数据集,这对美国成像构成了挑战.
研究的目的:
- 评估对比学习,特别是SimCLR的有效性,以尽量减少对胎儿标准平面识别的大型注释美国数据集的需求.
- 评估SimCLR在不同级别的类间变化和数据集大小的不同级别的性能.
主要方法:
- 探索了SimCLR在类别差异低或高的分类任务中的实用性.
- 研究了不同数量的标记数据对分类性能的影响.
- 采用了各种培训策略的对比学习.
- 使用了定量指标 (F1分数,灵敏度,精度) 和定性分析 (类激活映射,t-SNE).
主要成果:
- 对比学习在高跨类可变性任务中没有显著的优势.
- SimCLR证明对低跨类变性分类有好处,特别是在使用ImageNet权重初始化时.
结论:
- 相反的学习方法通常需要大量的数据,这对于美国数据集来说并不典型.
- 通过预训练 (使用ImageNet权重) 或端到端的双任务学习,SimCLR与标准转移学习相比,在小型,低跨类可变性的美国数据集中对性能产生积极影响.
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