Magnetic Resonance Imaging (MRI). Guide. Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to make pictures of organs and structures inside the body.In many cases, MRI gives different information about structures in the body than can be seen with an X-ray, ultrasound, or computed tomography (CT) scan.n MRI scan can be done for the: 1  Head. 2  MRI can look at the brain for tumors, an aneurysm, bleeding in the brain, nerve injury, and other problems, such as damage caused by a stroke. 3  MRI can also find problems of the eyes and optic nerves, and the ears and auditory nerves.
:: a brief history of CT. The first clinical CT scan on a patient took place on 1st October 1971 at Atkinson Morley's Hospital, in London, England.
Diagnostic Imaging Online August 19, 2004 CT inventor Godfrey Hounsfield dies Sir Godfrey N. Hounsfield, who won the 1979 Nobel Prize in Medicine for inventing computed axial tomography, died Aug. 12.He was 84.e was 84. The first CT machine took nine days to scan an object. Processing the information by computer then took 21 hours. Despite such formidable obstacles, researchers were undaunted.Hounsfield conceived the idea for a CAT scanner in 1967.