iTBS for Adolescent Depression: An Open Label Study Evaluating Safety and Efficacy of Treatment

This study will investigate the efficacy and durability of the effects of Intermittent Theta Burst Stimulation (iTBS) in adolescent depression by measuring changes in clinical ratings before, during, and after 4 weeks of treatment, up to 12 weeks following treatment. The investigators expect that subjects will show: improvement in symptoms over 20 iTBS sessions as measured by the Children's Depression Rating Scale Revised (CDRS-R), Hamilton Depression Rating Scale (HAM-D) and Non-suicidal Self Injurious Behavior (NSSIB) measures, and persistence of this reduction of depressive symptoms through the 12 weeks follow up period of the study. In this study, the investigators will investigate the safety of the effects of iTBS in adolescent depression. The investigators will investigate safety of the treatment regimen by assessing suicidality. The investigators expect suicidal thoughts and behavior will reduce with iTBS treatment as measured by the Columbia Suicide Severity Rating Scale (C-SSRS) and a psychiatrist's clinical assessment. The investigators also expect that those with NSSIB at the start of the trial will have less after iTBS treatments. The investigators do not expect any change in cognition measured with the Mini Mental Status Exam (MMSE), Trails B, and List Generation. The investigators will investigate treatment feasibility by assessing treatment completion and withdrawal. The investigators define the feasibility of iTBS will be defined as feasible by as completion of 15/20 (75%) iTBS treatment sessions by all subjects and withdrawal from treatment of no more than one of five subjects (20%) due to intolerable side effects or persistent symptoms of MDD. Investigation of efficacy, durability, safety as well as feasibility simultaneously is essential in this preliminary study of the use of iTBS in adolescents in order to justify a larger future study. This study will include a screening visit, 20 iTBS treatments, and 3 planned follow up visits.