## Uncancel

`StudyUncancelResponse Viewer.Studies.Uncancel(StudyUncancelParams?parameters, CancellationTokencancellationToken = default)`

**post** `/v1/viewer/studies/uncancel`

Restores a cancelled study to active status. The study must have been previously cancelled. Can be identified by either study ID or DICOM Study Instance UID.

### Parameters

- `StudyUncancelParams parameters`

  - `string studyID`

    Unique study identifier. Format: stu_{32-hex-chars}

  - `string studyInstanceUid`

    DICOM Study Instance UID. Must be a valid DICOM UID format (e.g., '1.2.840.10008.5.1.4.1.1.2')

### Returns

- `class StudyUncancelResponse:`

  Response for uncancelling a study in Viewer

  - `required Boolean Success`

  - `string Message`

### Example

```csharp
StudyUncancelParams parameters = new();

var response = await client.Viewer.Studies.Uncancel(parameters);

Console.WriteLine(response);
```