Patents by Inventor John James Jarrett

John James Jarrett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Display apparatus for use in radiography
    Patent number: 4086492
    Abstract: In computerized diagnostic X-ray apparatus data can be provided for a plurality of parallel sectional representations of the body of a patient. If, however, data are required for planes at different orientations in the body it has been usual to realign the body in relation to the apparatus and repeat the examination. It is now proposed to assemble data for inclined planes through the body by reassembly of data for the sections actually examined. The method of achieving this is described, together with a suitable apparatus for the purpose.
    Type: Grant
    Filed: January 7, 1977
    Date of Patent: April 25, 1978
    Assignee: EMI Limited
    Inventors: James Alec Lodge, John James Jarrett
  • Detection of radiation
    Patent number: 4070581
    Abstract: In a computerized axial tomographic apparatus it is proposed to use, as radiation detectors, alkali halide scintillator crystals cooperating with photodiodes to measure the light output therefrom, or else photodiodes directly sensitive to the radiation passed through the patient. For advantageous operation, especially in regard to drift and rapidity of operation, it is proposed to use the photodiodes photovoltaically and in the so-called "current mode".
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: January 24, 1978
    Assignee: EMI Limited
    Inventors: David John Gibbons, Wieslaw Antoni Karwowski, Charles Phillip Cousins, Ian MacDonald Green, John James Jarrett