Patent ID: 6556650
Filing Date: 2003-04-29
Classification: G01N

Abstract:
A method for obtaining a radiography image, said method comprising the steps of:emitting X-rays from an X-ray source into a chamber in any direction of a half sphere, which is symmetric around a normal vector of a cathode plan, with respect of a cathode or an anode in electrode arrangements; transmitting said X-rays through an object to be imaged; detecting the X-rays transmitted through said object in said chamber, the depth of which, in the direction of the incident radiation, is such as to permit interaction of a major fraction of the incident X-ray photons with atoms of a liquid, at a temperature between âˆ’30Â° C. and room temperature, or solid material in said chamber, for the production of primary ionization electron-ion pairs, within a detector including said electrode arrangements between which a voltage is applied for creating an electrical field; applying the voltage to said electrode arrangements in said detector for creating an electrical field which causes electron-ion avalanches of primary and secondary ionization electrons released by said incident X-ray photons; and detecting electrical signals in at least one detector electrode arrangement, said electrical signals being induced by said electron-ion pairs, in at least one of a plurality of detector electrode elements arranged adjacent to each other.