A History of the First CT Scan

The first CT scan of the human brain was made 50 years ago, on Oct. 1, 1971.

via Smithsonian

The possibility of precious objects hidden in secret chambers can really ignite the imagination. In the mid-1960s, British engineer Godfrey Hounsfield pondered whether one could detect hidden areas in Egyptian pyramids by capturing cosmic rays that passed through unseen voids.

He held onto this idea over the years, which can be paraphrased as “looking inside a box without opening it.” Ultimately he did figure how to use high-energy rays to reveal what’s invisible to the naked eye. He invented a way to see inside the hard skull and get a picture of the soft brain inside.

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