I lay flat on my back on the table. Large foam pads were placed under my elbows and round my neck. I was given a pair of headphones and a restraining strap was fixed across my forehead. Then I was shunted backwards into a narrow, cream-coloured tube. The door was locked and the room was filled with an incessant humming noise as the machine started. Soon the humming was replaced by squealing and the whole machine began to vibrate. Read more [...]