Hi Nicola, I took my NMP teddy in with meas long as my head was still i could hug teddy.
First try I went in an 'open scanner' about 2 seconds and i wanted out The 'open bit was at the side - i could put my arm out BUT could not SEE out cos i had to keep my head still

Best bit of info IF you have to press the buzzer to come out - DO your best to make sure that you press in the QUIET bit. that means that picture has been taken and you won't have to do that bit again.
I thought the noises resmbled = the drill next door used to remove chimney breast = and the noise of the final spin on teh washing machine
Best wishes
June