Near-infrared Radiation-transcranial Photobiomodulation for Major Depressive Disorder

The treatment will last for 8 weeks and be bilateral and applied to the frontal areas with one application site on the left side and one on the right side (left and right forehead centered on the frontal eminences and per EEG sites on F3 and F4). Energy is administered with a radiation wavelength of 830 nm. The duration of irradiation is from 20 minutes at each application site (the 2 sites are irradiated at the same time which is equivalent to 20 minutes of total time) to 40 minutes at each site, up to 2 times per day. The treatment will follow these specifications: PBM (IR) irradiance of 33.2 mW/cm2, each treatment window area is 28.7 cm2; PBM (IR) fluence of up to 60 Joules/cm2; energy delivered per session per device up to 1.72 kJ for a total of up to 3.44 kJ.

The sham device is completely identical in appearance, but only emits neglectable energy to the brain.