Q: Are there any exceptions in NFPA 13 for smoke detectors in lieu of sprinklers in areas such as radiology rooms or other high tech equipment rooms and still be considered "fully sprinklered"?

A: No. There is an exception in Section 8.15.10.3 of NFPA 13-2010 that allows electrical rooms not be sprinklered, and the building can still be considered fully sprinklered, provided the room is dedicated to electrical equipment only; only dry-type electrical equipment is used; equipment is installed in a 2-hour fire-rated enclosure including protection for penetrations; and no combustible storage is permitted in the room.

And, you can install clean agent suppression systems in lieu of wet sprinklers and the building is still considered fully sprinklered, but there are no exceptions allowing smoke detectors in lieu of sprinklers in any type of room, and still consider the building "fully sprinklered".