How do I merge DICOM files?

Hi,

I have a document of a phantom spine that contains a lot of single DICOM files which i assume to be the different slices of the CT scan of the spine. How do I merge all these DICOM files into one DICOM file to upload onto 3D Slicer so I can visualize the CT scan at each slice?

https://www.slicer.org/wiki/Documentation/4.10/Training#Slicer4_3D_Visualization_of_DICOM_images_for_Radiology_Applications