from New Scientist

Spoke wheel’ 

This is a CT scan of a human skull. 

The red ring-like pattern is cancer of the thyroid which has become detached from the thyroid and deposited itself on the skull bone, shown as rainbow-coloured layers. 

The yellow area shows a cut section at the top of the skull, which is due to the top part of the skull not being included in the CT scanning. 

The cancer has caused the bones of the skull to expand. 

Fung has used a post-production trick he developed, known as the “rainbow technique” to add coloured contour lines to this image. This enhances the 3D effect. 
(Image: Kai-hung Fung)

[ click to view more scans at NewScientist.com ]