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It is important that each project Participant Subject is assigned exactly 1 Participant Label Subject ID that is unique across the project. In multi-site or multi-modality projects, care must be taken to ensure the same participant Subject is not assigned multiple Participant Labels multiple Subject IDs at different sites or across different modalities. Of equal importance is the precise Participant Label precise Subject ID entry at every data entry occurence. A Participant Label A Subject ID typo can have significant consequences throughtout the Neuroinformatics Platform system.

The participant label The Subject ID must be the concatenation of the Project LabelID, an underscore and a Participant Subject Code.

Ex. ABC01_CMH_00000001

The Participant Subject Code denotes a specific person (or animal) within the study.

Guidelines for choosing an appropriate

Subject Code:

• must be 4 to 8 characters long
• preferably contains only numeric digits, but can include uppercase letters if needed
• recomended to start at 00000001 and increment as necessary
• must not contain lowercase letters, symbols, or whitespace (spaces, tabs, etc)
• must not include PHI (e.g., diagnosis), case/control status, or other sensitive information
• must not contain the characters 'PHA' in positions 4-6, since these indicate "phantom" (non-human) images in XNAT
• must not contain any coding related to location, visit, or any other code that is not representative of the subjectparticipant. (eg. BAD: ABC01_CMH_V10001 - where V1 represents the first visit)

If you have already started collecting data and your subjects participants do not follow this naming convention, please indicate this at your Neuroinformatics Platform project on-boarding meeting as a name conversion script might need to be implemented.