1) The trucks -- a lot of times MRI trucks are driven around to various hospitals, and scheduled in advance, for non-emergent studies. These obviously get scheduled during "working hours", and then the emergent off-hours MR studies are done by transporting the patient to a higher level facility and thus might get shot whenever.
2) The whole "doctor owned imaging center" scam or "perverse economic incentive", where doctors own imaging centers and then refer a lot of patients to them, increasing the use of the technology for basically no need. These are easy to schedule during working hours, too.
1) The trucks -- a lot of times MRI trucks are driven around to various hospitals, and scheduled in advance, for non-emergent studies. These obviously get scheduled during "working hours", and then the emergent off-hours MR studies are done by transporting the patient to a higher level facility and thus might get shot whenever.
2) The whole "doctor owned imaging center" scam or "perverse economic incentive", where doctors own imaging centers and then refer a lot of patients to them, increasing the use of the technology for basically no need. These are easy to schedule during working hours, too.