---
title: Other operations | Avara
description: List, update, and cancel studies; open Viewer from your app; and manage users — the rest of the Viewer API around study create.
---

[Create studies](/integration/viewer/create-studies/index.md) is the write that puts an exam into Viewer when you are not on Avara PACS. Everything on this page is the rest of the Viewer API around that study: look it up, change it, cancel it, and manage who can access studies. To open Viewer from your own app, see [Temporary access views](/integration/viewer/temporary-access-views/index.md).

There are no code samples here. Method names and request fields live in the [API Reference](https://docs.avarasoftware.com/api).

Identifiers you will see: studies `stu_…`, users `usr_…`, invitations `inv_…`.

Viewer has no report delivery, addendums, or clinical references. Those are AutoScribe.

## Studies

Once a study exists (created by you, or seeded by Avara PACS), you can find it and change its workflow state.

- **List** — Page through studies for your organization (cursor pagination). Use this to sync a worklist into your PACS or RIS.
- **Retrieve** — Fetch one study by Avara `studyId` (`stu_…`).
- **Retrieve by UID** — Fetch the same study by DICOM Study Instance UID when your system thinks in UIDs, not Avara ids.
- **Update** — Patch description, severity, assignment, and custom `metadata`. Viewer update does not take report headers (`reportMetadata`) or priors (`priorStudyIds`, `priorReportTexts`).
- **Cancel** — Mark a study cancelled so it drops out of the active worklist. The record remains; it is not deleted.
- **Uncancel** — Restore a cancelled study to the worklist.

## Users

Staff who work in Viewer. You can invite from the [dashboard](/viewer/inviting-users/index.md) or from the API when the key has user access.

- **Invite** — Create an invitation (email, name, role, level, dashboard access, and whether they can manage studies). Viewer invitations do not include NPI or report-creation flags. Owners cannot be invited via API.
- **List / retrieve / update** — Directory of users; change permissions or name after they exist.
- **Revoke access** — Remove the user from the organization.
- **Reactivate** — Restore a previously revoked user.

Invitations are their own records (`inv_…`): **list**, **retrieve**, **update**, and **revoke** a pending invite. The invited person must accept before you can assign studies to them. Status includes sent, accepted, rejected, and revoked.