The first patient brain CT scan was carried out on this day 50 years ago. CT or CAT scans, integrate X-rays with digital technology to generate 3D views of inner organs and soft tissues. Doctors can see clear images of cross-sections of the brain, with the grey and white matter and liquid-filled cavities clearly visible. CT scans are one of the most important diagnostic tools in the field of medicine. Godfrey Hounsfield and Allan Cormack were awarded the 1979 medicine prize for their development