PET scans: How clever chemistry uses radioactivity to help diagnose disease

Positron Emission Tomography (PET) scans are a way of imaging body functions in 3D using specially designed radioactive molecules. How do they work?

This video explains the work of Dr. Philip Miller from the Department of Chemistry at Imperial. Dr Miller creates radioactive tracer molecules, each of which is specially designed to have a biological function in the body. Watch here.