CT scans in Canada are based on a priority rating, your ER visit and scan would have been a Priority 1 (Emergent) and been done fairly quickly (depending what the situation was) or at the very most, within 24 hours.I've had CTs etc within MINUTES of entering an ER (A&E).
In Canada, they publish wait times (months) for CTs. And track the number of deaths of such people while waiting.