Mobile Restriction on Dopamine Transporter

Mobile Restriction on Dopamine Transporter

Restriction of mobile phone use for 2wks and undergo PET scanning for DAT bindinng. Free use of mobile phone use for 2wks and undergo PET scanning for DAT bindinng.

Inclusion Criteria:

• Healthy subjects with daily use of mobile phone (IPhone)
• Accessible with "Screentime" application

Exclusion Criteria:

• Neuropsychiatric disease
• Subjects who have medications for mental illness
• Subjects who cannot undergo PET scans
• Subjects who cannot participate 4 weeks of this study