RTDOSE scale

Rescale RT Dose grid values to the correct dose units.

Problem

An RT Dose (RTDOSE) object has a Dose Grid Scaling factor (3004,000E) that needs adjustment — the original value was exported incorrectly or needs to be modified for a dose recalculation downstream. You need to edit this tag using the standard DICOM tag editor (dosimetry recalculation is out of scope; this covers metadata editing only).

Steps

1. Open the RTDOSE DICOM file (⌘O) — e.g. rtdose.dcm.

2. Switch to Edit mode (⌘3) and filter for (3004,000E) (Dose Grid Scaling).

3. Edit the value — double-click, enter a valid DS (Decimal String) value like 2.5, and save.

4. Verify — the row is marked as modified (gold highlight) and the new value is displayed.

Validation

5. Attempt an invalid value — try entering not-a-number into the Dose Grid Scaling field. The save button is disabled and a red VR validation error is shown (DS VR requires a numeric string). Cancel to dismiss.

Expected Result

• Valid numeric values (e.g. 2.5) are accepted and saved.
• Non-numeric values (not-a-number) are rejected with a validation error.
• The original row remains unmodified after canceling an invalid edit.
• This is a metadata-only edit — the actual dose pixel data is not recalculated.