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Evaluation of functional MRI-based human brain parcellation: a review

机译：Evaluation of functional MRI-based human brain parcellation: a review

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摘要

Brain parcellations play a crucial role in the analysis of brain imaging data sets, as they can significantly affect the outcome of the analysis. In recent years, several novel approaches for constructing MRI-based brain parcellations have been developed with promising results. In the absence of ground truth, several evaluation approaches have been used to evaluate currently available brain parcellations. In this article, we review and critique methods used for evaluating functional brain parcellations constructed using fMRI data sets. We also describe how some of these evaluation methods have been used to estimate the optimal parcella-tion granularity. We provide a critical discussion of the current approach to the problem of identifying the optimal brain parcella-tion that is suited for a given neuroimaging study. We argue that the criteria for an optimal brain parcellation must depend on the application the parcellation is intended for. We describe a teleological approach to the evaluation of brain parcellations, where brain parcellations are evaluated in different contexts and optimal brain parcellations for each context are identified sepa-rately. We conclude by discussing several directions for further research that would result in improved evaluation strategies.

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