Furthering his career, he was employed at the Central Research Laboratories of the Electronic and Music Industry spearheading the completion of "Britain's first large solid-state computer and eventually adapting that design for use in transistors." These experiences ushered him to the idea of building the CT scanner.
During 1967, Hounsfield hit the idea of building a computer-assisted tomography (CT) scanner, a computer which will aid in the analysis of X-ray data. His invention surpassed the traditional X-ray by presenting a more accurate picture of any organ in the human body. His device "use information from many X-ray scans of the same area, taken at different angles, to generate a composite image." Furthermore, this new machine is more convenient for patients as they can comfortably lie on their back during the whole examination. The precision and sensitivity of the CT scan made it important in the diagnosis and treatment of nuerological disorder. The revolution in technology facilitates the invention of more advanced CT scanners which can build images in less than a second and allows better spiral scanning.