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US 2003/0147502 A1Published application
X-ray imaging apparatus with tube side filter for dividing the x-ray beam into multiple beams of differing intensities
OwnerBjorn Heismann, Thomas Von Der Haarinventors
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Abstract
An X-ray imaging apparatus for determining image data about the distribution of physical and chemical constituents in examination subjects of a human or animal nature or in materials or security inspection, a tube-side modification of a conventional CT apparatus to allow a two-spectra method to be employed but without an increase in the radiation stress on the subject. A two-part filter is introduced between the X-ray source and the subject to produce X-rays of at least two different intensities for transirradiating the subject.
Claims9
An X-ray apparatus comprising:
- an X-ray source which emits an X-ray beam adapted to transirradiate a subject;
- a filter having at least two filter parts disposed in a path of said X-ray beam preceding said subject, said filter dividing said X-ray beam into at least two X-ray beams differing in intensity;
- an X-ray detector disposed for detecting X-rays in said X-ray beams after attenuation by said subject and for converting detected X-rays into electrical signals;
- and
- a signal processing device supplied with said electrical signals for determining a distribution of density and atomic number in said subject from said signals.
2 more elements
Dependencies are inferred from the claim text.