<P> The history of X-ray computed tomography goes back to at least 1917 with the mathematical theory of the Radon transform . In October 1963 , Oldendorf received a U.S. patent for a `` radiant energy apparatus for investigating selected areas of interior objects obscured by dense material '' . The first commercially viable CT scanner was invented by Sir Godfrey Hounsfield in 1967 . </P>
<P> The history of X-ray computed tomography goes back to at least 1917 with the mathematical theory of the Radon transform . In October 1963 , Oldendorf received a U.S. patent for a `` radiant energy apparatus for investigating selected areas of interior objects obscured by dense material '' . The first commercially viable CT scanner was invented by Sir Godfrey Hounsfield in 1967 . </P>
in which decade was the ct scanner developed
in which decade was the ct scanner developed
1967
1967