As part of Anja's ongoing analysis of her illness, the next step after the bronchoscopy and CT scan, was to undergo a further scan known as a PET scan. PET stands for Positron Emission Tomography. This scan is more intensive and is done in order to take a deeper look at what is happening within the body. With a PET scan you first have an injection of a very small amount of a radioactive drug (tracer). The amount of radiation is very small – no more than you have during a normal X-ray. It only stays in the body for a few hours. Depending on which drug you have, the radioactive drug will travel to particular parts of your body. The most common drug is fluorine 18, also known as FDG-18. This is a radioactive version of glucose. When FDG-18 is injected into your body it travels to places where glucose is used for energy. It shows up cancers because they use glucose in a different way from normal tissue. And it will show up changes in tissues that use glucose as their main source of energy for example, the brain. [via] Unfortunately, ...