Cancer screening with PET
Nuclear medicine examinations allow to see what conventional tests cannot diagnose. The figure shows two "full body scans" obtained on two different patients by positron emission tomography (PET). Left image is normal: the right image is that of a patient with a lung tumor developing after a primary breast cancer. The scan shows an increased consumption of F-18 FDG in the tumor, the developing tumors using more sugar (glucose) than the surrounding normal tissues.