Brain Scans Analyzed Differently By PC and Macs
 

If you had the results of your last MRI or CT scan analyzed by a PC, your have nothing to worry about. If the same scan was analyzed by a Mac, we've got bad news for you. German researchers Ed Gronenschild and colleagues took a set of 30 brains and got FreeSurfer to estimate the size and thickness of various structures. Then they did the same thing, on the exact same brains, with a different version of the software. They found substantial differences in regional volumes, depending upon the version of FreeSurfer used. Running the same version of the software on a Mac vs a PC also created differences, and even the version of Mac OS had an impact.

http://www.hardocp.com/news/2012/06/...ly_by_pc_macs/