Bagheri Mahdi, Velasco-Annis Clemente, Wang Jian, Faghihpirayesh Razieh, Khan Shadab, Calixto Camilo, Jaimes Camilo, Vasung Lana, Ouaalam Abdelhakim, Afacan Onur, Warfield Simon K, Rollins Caitlin K, Gholipour Ali
University of California Irvine, Department of Radiological Sciences, Irvine, CA 92617, USA.
Boston Children's Hospital and Harvard Medical School, Department of Radiology, Boston, MA 02115, USA.
ArXiv. 2025 Aug 28:arXiv:2508.15034v2.
Accurate characterization of in-utero brain development is essential for understanding typical and atypical neurodevelopment. Building upon previous efforts to construct spatiotemporal fetal brain MRI atlases, we present the CRL-2025 fetal brain atlas, which is a spatiotemporal (4D) atlas of the developing fetal brain between 21 and 37 gestational weeks. This atlas is constructed from carefully processed MRI scans of 160 fetuses with typically-developing brains using a diffeomorphic deformable registration framework integrated with kernel regression on age. CRL-2025 uniquely includes detailed tissue segmentations, transient white matter compartments, and parcellation into 126 anatomical regions. This atlas offers significantly enhanced anatomical details over the CRL-2017 atlas, and is released along with the CRL diffusion MRI atlas with its newly created tissue segmentation and labels as well as deep learning-based multiclass segmentation models for fine-grained fetal brain MRI segmentation. The CRL-2025 atlas and its associated tools provide a robust and scalable platform for fetal brain MRI segmentation, groupwise analysis, and early neurodevelopmental research, and these materials are publicly released to support the broader research community.
准确描述子宫内脑发育对于理解典型和非典型神经发育至关重要。在先前构建时空胎儿脑MRI图谱的基础上,我们展示了CRL - 2025胎儿脑图谱,它是妊娠21至37周发育中胎儿脑的时空(4D)图谱。该图谱由160例脑发育正常胎儿的精心处理的MRI扫描构建而成,使用了与年龄核回归相结合的微分同胚可变形配准框架。CRL - 2025独特地包括详细的组织分割、短暂性白质区室以及划分为126个解剖区域。与CRL - 2017图谱相比,该图谱显著增强了解剖细节,并与CRL扩散MRI图谱一同发布,其具有新创建的组织分割和标签以及基于深度学习的多类分割模型,用于细粒度胎儿脑MRI分割。CRL - 2025图谱及其相关工具为胎儿脑MRI分割、组间分析和早期神经发育研究提供了一个强大且可扩展的平台,并且这些材料已公开发布以支持更广泛的研究群体。