Repetitive transcranial magnetic stimulation (rTMS) is an established technology as therapy for treatment-resistant depression. The approved method for treatment is 10Hz stimulation for 40 minutes over the left dorsolateral prefrontal cortex (L-DLPFC). This methodology has been very successful in real world situations. The limitations of this approach include the duration of the treatment (approximately 40 minutes per treatment session). Recently, researchers have aggressively pursued modifying the treatment parameters to reduce treatment times with some preliminary success. This study intends to further modify the parameters to create a more rapid form of the treatment and look at the change in neuroimaging biomarkers.