TABLE 5.

Recommendations about FDG-PET and SPECT rCBF imaging

For a patient with a diagnosis of dementia who has undergone the recommended baseline clinical and structural brain imaging evaluation and who has been evaluated by a dementia specialist but whose underlying pathological process is still unclear, preventing adequate clinical management, we recommend that the specialist obtain a 18F-FDG PET scan for differential diagnosis purposes (Grade 1B). If such a patient cannot be practically referred for a –FDG-PET scan, we recommend that a SPECT rCBF study be performed for differential diagnosis purposes (Grade 2C).