The radiologists talk to you throughout the process and let you know when each session is coming to an end. You will have a minute to wriggle your toes and take a deep breath before the next lot of images starts. They also gave me a call button. You can choose music to listen to but the imaging machine is pretty noisy.
I was face down and just focused on the music.
Good luck tomorrow - I wouldn't have a problem doing it again. Jane x