free volume element distribution

Hi All,

I am looking for a tool to calculate the free volume element distribution suggested by this paper. (Hofmann, D., et al. "Free volume distributions in ultrahigh and lower free volume polymers: comparison between molecular modeling and positron lifetime studies." Macromolecules 35.6 (2002): 2129-2140.) The result is like below one. 
User-added image


Does anybody know if Materials Studio implement this algorithm? I am considering to buy this software if it has. 

 Appreciate