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For The First Time, Scientists In Scotland Beamed Light Through A Human Head Using Enhanced FNIRS By Boosting Laser Strength And Refining Photon Collection. Only 1 Of 8 Participants Showed Results, But It Proved A Breakthrough For Deeper, Affordable, & Portable Brain Scans—Potentially Revolutionizing Diagnosis For Strokes, Tumors, And More.

https://www.sciencealert.com/scientists-beamed-light-right-through-a-mans-head-for-the-first-time

Scientists have developed a new technique for non-invasive brain imaging – and it involves shining light all the way through the head, from one side to the other.