I work at a firm that does a lot of contracting in medical field including hospitals.

We are currently working with some equipment in radiology. Devices need to be connected to network, so that they can display data on proprietary viewing device connected to the network. Some devices (and viewers) are using old versions of windows (win2000 and linux, still see RH4 ) as a base. You don't have control/access over the windows machines only vendors do, and a lot of them are obsolete versions. Windos 2k is still common.

Network dies (or is inaccessible) for any reason, and device is unusable, because you cant control it or see the results.

I spoke to their systems guys, they are aware of risk, but their hands are often tied.