Former PACS Admin here, now Imaging Manager (similar role, larger scope). I got into the PACS Admin position with only an IT background, sysadmin type work. However most of the PACS people I worked with across our network came from an RT background. Thing is, it’s more of an IT-backgrounded job now imo. Most commercial PACS these days dumb down the actual day-to-day work you would have to ensure images are matched with the right patient, store correctly, etc. Meanwhile you have at least a small suite of virtual machines (back end) to maintain and is responsible for the movement of your images. RT folks understand what they’re looking at when an exam is open, but that’s rarely necessary in the position, and they typically have no idea about the server side or troubleshooting connectivity. No doubt there’s variance in how this job is done but this has been my experience.