@Bc2 -
You shouldn’t need to get another CT scan. A competent radiologist or radiology tech should be able to generate 3D images from your existing scan. You can contact the lab where the scan was taken to request this. Some labs are willing to make 3D images post scan & others are not. Forewarned is fore-armed!
There is free software online for converting your CT scan to 3D images: https://www.radiantviewer.com
We also have a post on our forum that describes how to do this though it’s an older post & may have some obsolete info in it. Making Your Own 3D Images from CT Scan- 3D Slicer Tutorial