Basically, any patient who experienced fluoro time in excess of one hour should be notified and tracked for post-procedure erythema. Facilities should follow up by telephone approximately 3 weeks after the procedure to ascertain whether there is any evidence of a radiation induced injury. This will assure that prompt medical care will be delivered if necessary.
Other threshold criteria besides simple fluoro time are also discussed. The linked documentation in the above paragraph should be of great assistance in crafting a facility-specific policy to address this important issue.