These are images from a SPECT Scan3 (single photon emission computed tomography) scan of the cumulative results from 12 men receiving TMS.
The red-orange in these images show increases in blood flow in the brain as a result of TMS treatment. The bottom left image shows increased blood flow below the TMS coil. Other images also reveal increased blood flow in deeper brain regions involved in mood regulation and correlate with how TMS treats depression.
This scan is an example of how TMS only directly effects the brain circuits involved in mood regulation and not other circuits as medications do, resulting in unwanted side effects.