BIDS Format

If you're unfamiliar with the BIDS (Brain Imaging Data Structure) standard, refer to the MNE-BIDS documentation for more details on its structure and usage.

The configuration file for the MEGAP is written in JSON format and consists of two key sections: BIDS_structure_read and BIDS_structure_write. These sections allow users to specify parameters for reading from and writing to BIDS-compliant datasets.

BIDS_structure_read

This section specifies parameters required for reading data from the BIDS dataset:

"BIDS_structure_read": {
    "session": "rest",
    "task": "rest",
    "suffix": "meg",
    "datatype": "meg",
    "extension": ".fif"
}

• session: Defines the session name (e.g., "rest" for resting-state data).

• task: Describes the task performed during data acquisition (e.g., "rest").

• suffix: Indicates the file suffix, typically identifying the type of data (e.g., "meg" for MEG files).

• datatype: Specifies the data type (e.g., "meg").

• extension: Indicates the file extension (e.g., ".fif" for MEG data in FIFF format).

BIDS_structure_write

This section defines parameters for organizing and saving preprocessed outputs in the BIDS format:

"BIDS_structure_write": {
    "session": "rest",
    "task": "rest",
    "suffix": "meg",
    "datatype": "meg",
    "extension": ".fif"
}

• The same parameters are used as in the BIDS_structure_read section, ensuring consistency between the input and output data structures.

To ensure the MEGAP runs correctly, users must first complete the BIDS_structure_read and BIDS_structure_write sections in the configuration file. If any of the configuration fields are not required for your specific dataset, you can set them to null.