params

Separate JSON file - params.json

Series collection parameters are stored in a separate JSON file called params.json stored in the series directory. The JSON object is an array of key-value pairs. This can be used for MRI sequence parameters.

All DICOM tags are acceptable parameters. See this list for available DICOM tags https://exiftool.org/TagNames/DICOM.html. Variable keys can be either the hexadecimal format (ID) or string format (Name). For example 0018:1030 or ProtocolName. The params object contains any number of key/value pairs.

JSON variables

Variable	Description	Example
{Key:Value}	A unique key, sometimes derived from the DICOM header	Protocol, T1w FieldStrength, 3.0

Directory structure

Files associated with this section are stored in the following directory. subjectID, studyNum, seriesNum are the actual subject ID, study number, and series number. For example /data/S1234ABC/1/1.

/data/<SubjectID>/<StudyNum>/<SeriesNum>/params.json