Imaging the Dopamine Systems in Bulimia Nervosa

Inclusion Criteria: Participants with BN: * Meets DSM-IV criteria for BN * Sufficiently medically and psychiatrically stable to participate in research Health Control Participants: * No current or past psychiatric illness * Between 80% and 120% of ideal body weight Exclusion Criteria: All participants: * Current use of psychotropic medication such as anti psychotics or antidepressants * Pregnant or breastfeeding * history of substance abuse * Significant medical illness * High blood pressure (resting systolic blood pressure greater than 150mmHg and diastolic blood pressure greater that 90 mmHg) * Current or lifetime history of schizophrenia, bipolar disorder, or other psychotic disorder as defined by DSM-IV * Metal implants or paramagnetic objects contained within the body that may interfere with the MRI scan, as determined in consultation with a neuroradiologist and according to specified reference book guidelines * Exposed to radiation in the workplace or has had a nuclear medicine procedure during the 1 year before study entry * Previous adverse reaction to psycho stimulants