I have microCT image data which I have been segmenting using FEI Amira and now I need scale bars for the publication figures. Amira however does only display "1 unit" as unit and I have no idea how to get the program to read the actual scale from the image data. I didn't do the scans myself, I am only working with them, but I imagine the measurements have to be listed somewhere in the file's meta data.

So my question is, how do I get a proper scale bar in millimetres or centimeters which uses the actual measurements from my CT images?

Thanks in advance!