Medical imaging device using low-dose X- or gamma ionizing radiation
OwnerGeorges Charpakinventor
Life of this patent
Estimating the term…
Abstract
A medical imaging device using X- or gamma ionizing radiation, provided with a source of radiation in a divergent beam diaphragmed by a slit and a module for detecting a beam transmitted by a body to be observed, illuminated by the beam. The detection module comprises a drift chamber and a multiwire chamber which are filled with a gas, these chambers comprising, in a direction orthogonal to the plane containing the slit and the illumination beam, a drift space for the electrons, an electron proportional multiplier grid for generating multiplied electrons and corresponding ions and a second cathode electrode making it possible to count the multiplied electrons by means of the corresponding ions for a plurality of directions of the sheet-form illumination beam.
Claims9
Medical imaging device using a low-dose, X- or gamma ionizing radiation, comprising a source of ionizing radiation in a divergent beam, a longitudinal slit forming a diaphragm, making it possible to deliver a sheet-form illumination beam, distributed substantially in a plane containing the longitudinal slit and detection means for detecting a beam transmitted by a body to be observed, illuminated by the sheet-form illumination beam, wherein said detection means comprise a drift chamber and a multiwire chamber which are filled with a gas making it possible to generate electrons, said chambers comprising, arranged in a direction orthogonal to the plane containing the slit and the sheet-form illumination beam:
- a drift space for the electrons, comprising a first cathode electrode,
- an electron proportional multiplier grid for generating multiplied electrons and corresponding ions, and, in the vicinity of said proportional multiplier grid,
- a second cathode electrode making it possible to count the multiplied electrons by means of the corresponding ions for a plurality of directions of the sheet-form illumination beam.
Dependencies are inferred from the claim text.