Neurological Symptoms and Findings in Individuals Exposed to Indoor Air Pollutants

Inclusion Criteria: All: * Signing the informed consent form * Adults over 18 years of age Indoor air pollutant groups: * Exposed to indoor air pollutants * Neurological symptoms Neurological symptoms groups: * Neurological symptoms possibly due to adverse external exposure Healthy controls: * Reported healthy person Exclusion Criteria: All: * Pregnancy or breast-feeding * Corticosteroid treatment within 4 weeks of imaging * Patients with claustrophobia, or a history of moderate to severe anxiety disorder or panic attacks (which could potentially lead to preterm termination of the imaging) * Contraindication to PET scan and MRI investigations * Exposure to experimental radiation in the past 12 months such that radiodosimetry limits would be exceeded by participating in this study. * Intolerance to previous PET scans; i.e. previous hypersensitivity reactions to any PET ligand or imaging agent or failure to participate in and comply with previous PET scans. Neurological symptoms groups and healthy controls: * Exposure to indoor air pollutants