MPR / reformat export

Generate and export multiplanar reformats from a volume.

Problem

You have a 3D CT volume (8 axial slices sharing a Series Instance UID, loaded as a volume in Cornerstone) and you need to export a single coronal, sagittal, or axial slice as an image or DICOM Secondary Capture. This is useful for generating reference images, creating teaching files, or extracting a specific reformatted plane for analysis.

Steps

1. Load a multi-slice volume (⌘O) — e.g. 8 DICOM files from the same series forming a 3D volume.

2. Switch to MPR mode — click the 3D/MPR toggle button in the top bar. Three viewports appear (Axial, Sagittal, Coronal) once the volume has loaded. Wait for all three viewports to show data-volume-ready="true".

3. Open the Export menu — click the Export button in the top bar and select Export MPR Slice… from the dropdown.

4. Choose format — the modal defaults to PNG. The current slice from the active viewport orientation (Axial/Sagittal/Coronal) is captured.

5. Optional: DICOM Secondary Capture — check Save DICOM Secondary Capture to also export a .dcm companion file with the MPR slice wrapped in proper DICOM headers.

6. Click Export — the modal closes on success.

7. Verify via audit log — switch to the Audit tab. The entry shows the orientation (Axial/Sagittal/Coronal) and the exported filename (.png, .dcm).

Expected Result

• A PNG file of the current MPR slice is downloaded at native volume resolution with W/L baked in.
• If DICOM SC is checked, a companion .dcm file is also saved (audit entry shows ”+ DICOM SC”).
• The modal closes automatically after successful export.
• Export requires the MPR viewports to be fully volume-ready (3 viewports with data-volume-ready="true").