Moderate Sedation policy

What's everybody's P&P for doing moderate sedation in particularly MRI? At my hosp., our policy has been reworked a million times but is still very frustrating and confusing! We are being told that it is a JCAHO requirement for a physician "to be in constant visual sight of the patient during initial and continued administration of meds" during moderate and deep sedation of patients. Generally not a problem because this often occurs during procedures that the Rad is there, anyway. But, when we need to sedate an adult for MRI who has failed oral sedation and needs IV meds, there is NO WAY the Rad wants to sit right there with us for a 30 min - 2 hr scan. We are considering having anesthesia do all these cases if we must comply with this statement. But, to us Rad nurses, it seems like an expensive overkill when we all are trained and feel comfortable with controlling moderate sedation WITHOUT the Rad having to be right there the whole time. What are you all doing? How do you feel about this, if it truly is a JCAHO requirement?

Thanks!