Method and apparatus for detection of ionizing radiation
AssigneeXCounter AB
InventorsTom Francke, Skiff Sokolov
Life of this patent
Estimating the term…
Abstract
A method for detection of ionizing radiation comprises the steps of (i) directing ionizing radiation towards an object to be examined; (ii) preventing Compton scattered radiation, preferably at least 99% of the radiation Compton scattered in said object, from being detected; and (iii) detecting ionizing radiation spatially resolved as transmitted through said object to reveal a spatially resolved density of said object, wherein said ionizing radiation is provided within a spectral range such that more, preferably much more, photons of said ionizing radiation are Compton scattered than absorbed through the photoelectric effect in said object to thereby reduce the radiation dose to said object.
Claims68
A method for detection of ionizing radiation comprising:
- directing ionizing radiation towards an object to be examined;
- preventing Compton scattered radiation from being detected;
- and
- detecting ionizing radiation spatially resolved as transmitted through said object without being deflected to reveal a spatially resolved density of said object, wherein
- said ionizing radiation is provided within a spectral range such that more photons of said ionizing radiation are Compton scattered than absorbed through the photoelectric effect in said object to thereby reduce the radiation dose to said object.
A method for detection of ionizing radiation comprising:
- directing ionizing radiation towards an object to be examined;
- preventing radiation originating from pair production in said object from being detected;
- and
- detecting ionizing radiation spatially resolved as transmitted through said object without being deflected to reveal a spatially resolved density of said object, wherein
- said ionizing radiation is provided within a spectral range such that more photons of said ionizing radiation are converted to electrons and positrons in a pair production process than absorbed through the photoelectric effect in said object.
An apparatus for radiographic measurement of an object comprising:
- an X-ray source, emitting broadband radiation;
- a filter arrangement arranged in front of said X-ray source for filtering said emitted broadband radiation;
- a source aperture arranged in front of said X-ray source for collimating said emitted broadband radiation;
- an object region for housing said object during said radiographic measurement and arranged such that said filtered and collimated broadband radiation can be transmitted through said object;
- and
- a detector device arranged to record an image of said filtered and collimated broadband radiation as being transmitted through said object without being deflected, wherein
- said filter arrangement has a filter function depending on the object to be measured such that said radiation as filtered is within a spectral range such that more X-ray photons are Compton scattered than absorbed through the photoelectric effect in said object;
- and
- said detector device is arranged to prevent Compton scattered radiation in said object from being detected.
An apparatus for radiographic measurement of an object comprising:
- an X-ray source;
- a filter arrangement arranged in front of said X-ray source for filtering said emitted broadband radiation;
- a source aperture arranged in front of said X-ray source for collimating said emitted broadband radiation;
- an object region for housing said object during said radiographic measurement and arranged such that said filtered and collimated broadband radiation can be transmitted through said object;
- and
- a detector device arranged to record an image of said filtered and collimated broadband radiation as being transmitted through said object without being deflected, wherein
- said filter arrangement has a filter function depending on the object to be measured such that said radiation as filtered is within a spectral range such that more X-ray photons are converted to electrons and positrons in a pair production process than absorbed through the photoelectric effect in said object;
- and
- said detector device is arranged to prevent radiation originating from pair production in said object from being detected.
Dependencies are inferred from the claim text.