Positron Emission Tomography

For almost three years, Janelle Lafser pleaded with doctors to order a PET scan for her husband, Frank. He had been experiencing memory and mood problems -- beginning at age 45 -- and was having trouble in his job as an executive at a paint company. The doctors said he was depressed, but Janelle was unconvinced. She told them that her husband forgot plans the couple had made, misplaced things and found paying bills too confusing.