MGA-Net:用于新生儿脑部精确成像的新型面具引导注意力神经网络。

IF 4.7 2区 医学 Q1 NEUROIMAGING NeuroImage Pub Date : 2024-09-28 DOI:10.1016/j.neuroimage.2024.120872
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引用次数: 0

摘要

在本研究中,我们介绍了 MGA-Net,这是一种新型的掩膜引导注意力神经网络,它扩展了 U-net 模型,可用于新生儿脑部精确成像。MGA-Net 设计用于从其他结构中提取大脑并重建高质量的大脑图像。该网络采用一个普通编码器和两个解码器:一个用于大脑掩膜提取,另一个用于大脑区域重建。MGA-Net 的一个主要特点是其高级掩膜引导注意模块,该模块利用脑掩膜解码器的特征来增强图像重建。为了让同一个编码器和解码器同时处理核磁共振成像和超声波(US)图像,MGA-Net 集成了正弦位置编码。这种编码为核磁共振成像和超声波图像分配了不同的位置值,使模型能有效地从两种模式中学习。因此,从单一模式中学习到的特征可以帮助学习可用数据较少的模式,如 US。我们在来自不同临床环境和新生儿年龄组的各种独立数据集上对所提出的 MGA-Net 进行了广泛验证。评估指标包括用于图像分割的 DICE 相似性系数、召回率和准确率;用于图像重建的结构相似性;以及用于从三维超声图像估算总脑容量的均方根误差。我们的研究结果表明,MGA-Net 明显优于传统方法,在大脑提取和分割方面表现出色,同时在图像重建和容积分析方面实现了高精度。因此,MGA-Net 是一种用于核磁共振成像和三维超声波图像的强大而有效的预处理工具,标志着神经成像技术的重大进步,可提高新生儿期及以后的研究和临床诊断水平。
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MGA-Net: A novel mask-guided attention neural network for precision neonatal brain imaging
In this study, we introduce MGA-Net, a novel mask-guided attention neural network, which extends the U-net model for precision neonatal brain imaging. MGA-Net is designed to extract the brain from other structures and reconstruct high-quality brain images. The network employs a common encoder and two decoders: one for brain mask extraction and the other for brain region reconstruction. A key feature of MGA-Net is its high-level mask-guided attention module, which leverages features from the brain mask decoder to enhance image reconstruction. To enable the same encoder and decoder to process both MRI and ultrasound (US) images, MGA-Net integrates sinusoidal positional encoding. This encoding assigns distinct positional values to MRI and US images, allowing the model to effectively learn from both modalities. Consequently, features learned from a single modality can aid in learning a modality with less available data, such as US. We extensively validated the proposed MGA-Net on diverse and independent datasets from varied clinical settings and neonatal age groups. The metrics used for assessment included the DICE similarity coefficient, recall, and accuracy for image segmentation; structural similarity for image reconstruction; and root mean squared error for total brain volume estimation from 3D ultrasound images. Our results demonstrate that MGA-Net significantly outperforms traditional methods, offering superior performance in brain extraction and segmentation while achieving high precision in image reconstruction and volumetric analysis. Thus, MGA-Net represents a robust and effective preprocessing tool for MRI and 3D ultrasound images, marking a significant advance in neuroimaging that enhances both research and clinical diagnostics in the neonatal period and beyond.
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来源期刊
NeuroImage
NeuroImage 医学-核医学
CiteScore
11.30
自引率
10.50%
发文量
809
审稿时长
63 days
期刊介绍: NeuroImage, a Journal of Brain Function provides a vehicle for communicating important advances in acquiring, analyzing, and modelling neuroimaging data and in applying these techniques to the study of structure-function and brain-behavior relationships. Though the emphasis is on the macroscopic level of human brain organization, meso-and microscopic neuroimaging across all species will be considered if informative for understanding the aforementioned relationships.
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