"You can train the nurse to use Windows XP (which she has used for 10 years now), then you suddenly expect her to jump to Linux, OSX and Windows 10? That would cause issues at a hospital, where every job a nurse does is mission critical (btw, I love nurses, they have saved my life a fair few times now)."
Training is provided on the application not the OS. The OS sits behind the application causing no end of security woes (if its Windows). Most people I've met that operate CT/MR/X-RAY systems don't give two hoots what the OS is. They learn and understand the application.
And if a manufacturer of CT/MR/X-RAY/Nuclear had any sense that would avoid managements love affair with Windows and switch all such pieces of equipment to Linux. All the rest that use Microsoft Word and occasionally move a file around on their computer can live in blissful ignorance with their virus/malware infested pile of shite called Windows.
Biting the hand that feeds IT
