Data Storage Hierarchy
Data is stored in NiDB using a hierarchy. The root object is the subject. Each subject can be enrolled in multiple projects. Within each of those projects, the subject can have multiple imaging studies with different modalities. And within each imaging study, there are multiple series. Additionally measures and drugs are attached at the enrollment level. And analyses are attached to imaging studies.
Below is an example subject, enrolled in multiple projects, with imaging studies, and analyses.
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