Definition: The Brain Imaging Data Structure (BIDS) is a standardized format for organizing and describing neuroimaging data such as fMRI, EEG, fNIRS as well as behavioral data, among others, making it accessible to and shareable with a wide range of researchers from diverse backgrounds. It is based on a formalized file and folder structure and JSON (Javascript Object Notation)-based metadata files with controlled vocabulary. The top-level directory contains subdirectories for each subject, and each subject directory contains subdirectories for each session and modality. It includes the core specification as well as extensions for specific brain imaging modalities and other types of data. (

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Related terms: SNIRF, Open Science, Open Data, Data Structure, Standardization  

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