There are two schedules for on-call / emergency procedures. The first schedule covers Friday-Sunday. The rotating radiology resident covers call one weekend per month. The VIR fellows cover the remaining 40 weeks on a rotating basis with the attending staff. The VIR fellows and the radiology resident cover the Monday-Thursday schedule on a rotating basis as well. The VIR fellows and radiology residents constitute "first call" since they are typically contacted directly by physicians requesting the performance of an interventional procedure. All on-call and emergency procedures are performed under the supervision of a member of the VIR attending staff.