You can import any 3Dfiles not only from a scanner ;)
POLYGON IMPORT/EXPORT
3DS OBJ
DXF PLY
IGS STL
LWO VRML
NAS WRP

CAD IMPORT/EXPORT
IGES
STEP 203/214
Neutral
VDA
Pro/E PRT
Parasolid .x_t* and .x_b*
SAT


http://www.youtube.com/watch?v=Kbnbea3Hr9E reverse ingineering
http://www.youtube.com/watch?v=0gJThuVyMSQ hole filling
etc...