Smoothing objects which has been created from CTscan/MRI images

Hi,

I have created some geometries(.stl) using CTscan data. I have to import them for CFD or Finite element analysis and surfaces should be very smooth. I have 2 questions:

1- How can I smooth the surfaces in Solidworks?

2- I use another software to creat geometries based on CT data. Is it possible that I import Ct data and make 3D objects directly  in solidworks?

Thanks ,

Hani

SolidworksImport export