Calculate the sum of 2 RT Dose

Operating system: windows
Slicer version: 4.13

Hi everyone
I have two brachytherapy RT doses from the same anatomical region and I want to add them together to calculate the total dose in tumor and normal organs using dose volume histogram module. Can I add these two RT dose using 3D slicer?

Thanks a lot

Install the SlicerRT extension and look for the Dose Accumulation module.