Missing required tags report

List every Type 1/2 tag that is missing or empty for the object type.

Problem

A DICOM file is missing mandatory tags required by its IOD. For example, a CT Image Storage SOP Class may be missing SOPClassUID (0008,0016) or SOPInstanceUID (0008,0018) — both Type 1 mandatory tags. You need to identify all missing tags and add or correct them.

Steps

1. Open the DICOM file — click Open files… (⌘O).
2. Open the QA panel — click the QA tab in the right rail.
3. Review the Errors list — the QA panel shows all missing mandatory tags with their expected VR and IOD requirement level.
4. Add a missing tag — right-click the metadata tree and select Add Tag. Enter the missing tag group/element (e.g. 0008,0018), VR (e.g. UI), and a valid value.
5. Verify the QA panel clears — after adding the tag, the error count decrements.
6. Negative verification — attempt to delete SOPClassUID in Edit mode. The QA panel immediately flags it as a Type 1 violation. The edit modal blocks saving an empty value.

Expected Result

• Missing mandatory Type 1 tags appear in the QA panel Errors section.
• Adding a missing tag decrements the error count.
• Deleting a Type 1 tag in Edit mode immediately triggers an error in the QA panel.
• The Edit Tag modal blocks saving an empty value for mandatory tags.
• After all fixes, error count reaches zero.