Circles within circles, and circles interacting with circles. For this challenge I raided every picture in my stash with a circle in it. They have been blended and segmented and overlaid to produce this complex picture. It is a step away from the simpler pictures I have been doing, but I hope it works.
There is a spiral within these interactions that focusses on a small yellow ball. The focus is extracted from an X-ray image of a child who had swallowed a 20¢ piece. It was stuck in his throat at the thoracic inlet. Coins and button batteries seem to be the main foreign bodies children swallow these days, the latter can give a large dose of lithium and poison the child, the former can get stuck and if not removed, erode through the oesophagus causing all kinds of mischief.