Having recently had a CT scan at the General, I can confirm 100% that you do not need to register or pay the €2 but go straight to the X-ray Department. The only thing you will need is the original request form showing your appointment. The scan results take around a week and then you have to collect from the X-ray Department Reception. To be on the safe side, take your medical card (although they didn't ask for mine).
The only time you have to register, pay the €2 and collect labels is when you are consulting a doctor who may prescribe medication. hence the labels. Appointments for scans, physio and such like do not require registration.
Don't queue up at the X-ray Department window, proceed pass and go down the corridor and turn right before the end to take you to the CT scan area and hand your appointment/request to someone and then wait to be called.
I stand corrected...
thank you for the info as I have both an xray and ultra sound looming in the very near futureand now know not to waste time and money at reception...
Sheila
Hope this helps.