How to import a phantom as images DICOM in DICOM example?

Hello,I hope you’re doing well. I am turning to you to seek your expertise,
I’m new to using GEANT4, and my project focuses on the GEANT4 DICOM example. I want to import my own phantom model as DICOM images, but I’m having difficulty even though I read the readme of the example.
Could you guide me on the steps and necessary changes I need to make in the initial GEANT4 program to achieve this goal? While I have version 10.04.P02 of GEANT4.
I’m currently stuck at this step, and your assistance would be greatly appreciated. Thanks a lot for your help.