This object is an array of subjects, with information about each subject.

JSON variables

Directory structure

Files associated with this section are stored in the following directory

/data/<SubjectID>

The package root contains all data and files for the package. The JSON root contains all JSON objects for the package.

JSON variables

Directory structure

Files associated with this object are stored in the following directory.

/

An array of imaging studies, with information about each study. An imaging study (or imaging session) is defined as a set of related series collected on a piece of equipment during a time period. An example is a research participant receiving an MRI exam. The participant goes into the scanner, has several MR images collected, and comes out. The time spent in the scanner and all of the data collected from it is considered to be a study.

Valid squirrel modalities are derived from the DICOM standard and from NiDB modalities. Modality can be any string, but some squirrel readers may not correctly interpret the modality or may convert it to “other” or “unknown”. See full list of modalities.

JSON variables

Directory structure

Files associated with this section are stored in the following directory. SubjectID and StudyNum are the actual subject ID and study number, for example /data/S1234ABC/1.

/data/<SubjectID>/<StudyNum>

This object contains information about the squirrel package.

JSON variables

Variable options

subjectDirFormat, studyDirFormat, seriesDirFormat

• orig - Original subject, study, series directory structure format. Example S1234ABC/1/1

• seq - Sequential. Zero-padded sequential numbers. Example 00001/0001/00001