How to Create a new Volume for Volume Rendering

I have a MR dicom data and I want to view 3D with volume rendering. Folder include 3 volume but each volume contain only one clear part (as shown in image). My purpose is create a new volume that includes clear parts from other volumes. Is that possible? If possible how can i do step by step.

Thank you.

This question comes up fairly often, but it’s unfortunately hard to search for in discourse.

This thread summarizes what I believe you are facing: