Open .ori files with Fiji?

Dear all,

Someone knows how to use stacks of .ori files?
I received those along with a stack of .dcm files from a ct-scanning facility. The .ori stacks seems to represent individual scans, and the .dcm stack the multiscan deriving from their grouping (I would like to have a look at the individual scans before they were put together).

Thanks a lot in advance,