MRI BRAIN SCAN - should I be worried?

So I have just an MRI brain scan and was just wondering if everyone that has had one has had the radiographer/radiologist in the room doing the scan bring in a doctor for one part of the scans and then rang someone up on the telephone during the last scan ? Obviously I felt a bit anxious at seeing this through the mirror on the helmet thing. 

I'm just hoping this is procedure on every MRI/MRI brain scan? 

Thanks