Principle of PET-CT
This diagram shows the principle of combining a scanner and a PET camera. The scanner and camera surround the bed where the patient is and move along the bed (axial movement). The PET camera detects annihilation photons from the radiopharmaceutical product, whereas X-rays from the scanner provides anatomical image of the body part examined.
A.Aurengo/ Hôpital Pitié-Salpêtrière (Image Siemens)