Any Open-source Tools to Derive FFR from DICOMs of X Ray Angiograms
 

I have some old DICOMs from x ray coronary angiograms that I need to derive FFR values from

I know several paid tools that can do this like QAngio XA 3D/QFR and CAAS vFFR.

Do any packages exist with open foam that can do anything similar? Or any other free tools?