Recon-all-clinical: Cortical surface reconstruction and analysis of heterogeneous clinical brain MRI

• URL: http://arxiv.org/abs/2409.03889v1
• Date: Thu, 5 Sep 2024 19:52:09 GMT
• Title: Recon-all-clinical: Cortical surface reconstruction and analysis of heterogeneous clinical brain MRI
• Authors: Karthik Gopinath, Douglas N. Greve, Colin Magdamo, Steve Arnold, Sudeshna Das, Oula Puonti, Juan Eugenio Iglesias,
• Abstract summary: We introduce recon-all-clinical, a novel method for cortical reconstruction, registration, parcellation, and thickness estimation in brain MRI scans. Our approach employs a hybrid analysis method that combines a convolutional neural network (CNN) trained with domain randomization to predict signed distance functions. We tested recon-all-clinical on multiple datasets, including over 19,000 clinical scans.
• Score: 3.639043225506316
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Surface-based analysis of the cerebral cortex is ubiquitous in human neuroimaging with MRI. It is crucial for cortical registration, parcellation, and thickness estimation. Traditionally, these analyses require high-resolution, isotropic scans with good gray-white matter contrast, typically a 1mm T1-weighted scan. This excludes most clinical MRI scans, which are often anisotropic and lack the necessary T1 contrast. To enable large-scale neuroimaging studies using vast clinical data, we introduce recon-all-clinical, a novel method for cortical reconstruction, registration, parcellation, and thickness estimation in brain MRI scans of any resolution and contrast. Our approach employs a hybrid analysis method that combines a convolutional neural network (CNN) trained with domain randomization to predict signed distance functions (SDFs) and classical geometry processing for accurate surface placement while maintaining topological and geometric constraints. The method does not require retraining for different acquisitions, thus simplifying the analysis of heterogeneous clinical datasets. We tested recon-all-clinical on multiple datasets, including over 19,000 clinical scans. The method consistently produced precise cortical reconstructions and high parcellation accuracy across varied MRI contrasts and resolutions. Cortical thickness estimates are precise enough to capture aging effects independently of MRI contrast, although accuracy varies with slice thickness. Our method is publicly available at https://surfer.nmr.mgh.harvard.edu/fswiki/recon-all-clinical, enabling researchers to perform detailed cortical analysis on the huge amounts of already existing clinical MRI scans. This advancement may be particularly valuable for studying rare diseases and underrepresented populations where research-grade MRI data is scarce.

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