Not activated at the site level

This study will evaluate a new form of non-invasive deep brain therapy for food addiction. Low-intensity transcranial focused ultrasound stimulation will first be delivered using a range of stimulation parameters during psychophysical and physiological monitoring. A well-tolerated stimulation protocol will be selected for subsequent testing in a blinded randomized sham-controlled trial. The trial will evaluate brain target engagement using magnetic resonance imaging, Food Cravings Questionnaire-State, and changes in subject's weight over the course of the study.

Inclusion Criteria:

• History of at least one self-reported unsuccessful dietary effort to lose body weight
• Body mass index more than or equal to 30 kg/m^2 or more than or equal to 25 kg/m^2 with the presence of at least one of the following weight-related comorbidities: hypertension, dyslipidaemia, obstructive sleep apnoea, or cardiovascular disease.

Exclusion Criteria:

• Lifetime history of a serious suicide attempt
• MRI intolerance or contraindication
• Pregnant or breast feeding
• Diabetic (HbA1c more than 48 mmol/mol or 6.5%)
• A self-reported change in body weight more than 10 lbs within 60 days before screening
• Clinically inappropriate for participation in the study as determined by the study team