Please fast for 4 hours before exam. Nothing to eat or drink for 4 hours before the exam. Please remember to bring your requisition, AHC card and photo ID. You may also send us your requisition in advance using the form below. Healthcare Number (required): No AB PHN Requisition (required): Submit Please note: Only upload a Requisition if you have already booked an exam with us or are on your way to visit us for a walk in x-ray.