# User Permissions

NiDB users can have many different permissions, from complete system administration to read-only access. Most users will fall into the project-based permissions. Below are the description of each permission. Protected health information (PHI) and personally identifiable information (PII) are both referred to as PHI below.

<table><thead><tr><th width="161.33333333333331">Permission</th><th>Description</th><th>How to grant</th></tr></thead><tbody><tr><td><strong>Read-only PHI</strong></td><td><ul><li>View lists of subjects/studies in project</li><li>View subject PHI</li></ul></td><td>Admin --> Users --> Project permissions</td></tr><tr><td><strong>Read-only imaging</strong></td><td><ul><li>All permissions from <strong>Read only PHI</strong></li><li>Search, view, download imaging</li></ul></td><td>Admin --> Users --> Project permissions</td></tr><tr><td><strong>Full PHI</strong></td><td><ul><li>All permissions of <strong>Read only PHI</strong></li><li>Modify PHI</li><li>Create or import assessment (measures, vitals, drugs) data</li></ul></td><td>Admin --> Users --> Project permissions</td></tr><tr><td><strong>Full imaging</strong></td><td><ul><li>All permissions of <strong>Read only imaging</strong></li><li>Download, upload, modify, delete imaging data</li><li>Create new imaging studies</li><li>Add, modify series notes</li><li>Add, modify series ratings </li></ul></td><td>Admin --> Users --> Project permissions</td></tr><tr><td><strong>Project admin</strong></td><td><ul><li>All permissions of <strong>Full imaging</strong> and <strong>Full PHI</strong></li><li>Enroll subject in project</li><li>Move subjects between projects</li><li>Move imaging studies between projects</li><li>Modify series (rename, move to new study, hide/unhide, reset QC)</li></ul></td><td>Admin --> Users --> Project permissions</td></tr><tr><td><strong>NiDB admin</strong></td><td><ul><li>All project-based permissions of <strong>Project admin</strong></li><li>Manage (add, edit, remove) projects and users</li><li>Can view the Admin page</li></ul></td><td>Admin --> Users</td></tr><tr><td><strong>Site admin</strong></td><td><ul><li>All non-project based permissions of <strong>NiDB admin</strong></li><li>Manage system settings</li><li>View system status &#x26; usage</li><li>Manage NiDB modules</li><li>Manage QC modules</li><li>Mass email</li><li>Manage backup</li><li>View error logs</li><li>Set system messages</li><li>View reports</li><li>Manage audits</li><li>Manage sites</li><li>Manage instances</li><li>Manage modalities</li><li>Access to "Powerful tools" on Projects --> Studies page</li><li>Manage all file I/O</li><li>All permissions available to NiDB admin</li></ul></td><td>Editing the <code>users</code> table in Mariadb and changing the <code>user_issiteadmin</code> column to <code>1</code> for that user</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.neuroinfodb.org/nidb/tutorials/administration-of-users-projects-and-system/user-permissions.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.