Vendor lock in
We are "blessed" with major lock in to IE 6, early Java versions and no way to escape these.
Our CT scanners still run on top of XP, the web PACS requires IE6, our RIS is a lousy JAVA GUI of a DOS application that allows eg patient ID number field to have unlimited input length. The kit won't do NTP.
We make the navy look sophisticated. its not like it impacts peoples lives and safety...
We are currently upgrading our PACS. Interesting times