How do I save a series of dicom-files (slices from a CT scan) to one single dicom file?

As the title says, how do I save a series of dicom-files (slices from a CT scan) to one single dicom file? It would also work if it's saved as a nrrd-file.

Thanks!

[Abir AFFANE]

Hi i need this too if you have find the anser plz!!

thanks