Deep learning-based methods have achieved excellent performance in various fields of brain image analysis. Most of the existing deep learning-based methods usually rely on large-scale datasets with high-quality full annotations. However, to acquire such data is usually time-consuming and requires rich expert experience. Moreover, because of Individual differences in experience and understanding, large-scale and full annotated datasets may suffer from large intra- and inter-observer variability, which could hinder their application in brain image analysis. In contrast, weak yet low-cost annotations (such as coarse annotations, partial annotations, or small sample annotations) are far easier to collect than high-quality full detailed annotations. Consequently, there is a strong desire for innovative deep learning-based methodologies that can efficiently learn from weak annotation data and achieve competitive performance compared with using full annotation data.
Deep learning-based methods have achieved excellent performance in various fields of brain image analysis. Most of the existing deep learning-based methods usually rely on large-scale datasets with high-quality full annotations. However, to acquire such data is usually time-consuming and requires rich expert experience. Moreover, because of Individual differences in experience and understanding, large-scale and full annotated datasets may suffer from large intra- and inter-observer variability, which could hinder their application in brain image analysis. In contrast, weak yet low-cost annotations (such as coarse annotations, partial annotations, or small sample annotations) are far easier to collect than high-quality full detailed annotations. Consequently, there is a strong desire for innovative deep learning-based methodologies that can efficiently learn from weak annotation data and achieve competitive performance compared with using full annotation data.