X-ray exposure system for 3D imaging
First Claim
1. An X-ray system comprising:
- an X-ray source which emits an X-ray beam;
an X-ray receiver on which said X-ray beam is incident;
means for moving said X-ray source and said X-ray receiver relative to an examination subject for obtaining a plurality of 2D projections of a region of the subject from a plurality of different projection angles, each of said projection angles having a unique projection geometry of the X-ray source and the X-ray receiver associated therewith, said X-ray source, said X-ray receiver and said means for moving comprising an X-ray apparatus;
a camera allocated to said X-ray apparatus for following movements of said X-ray apparatus, said camera having a field of view and producing camera signals;
a position indicator disposed separate from said X-ray apparatus and in said field of view of said camera, said position indicator producing information in said camera signal identifying the projection geometry for each of said different projection angles of said 2D projections, said camera and said position indicator being disposed outside of said X-ray beam emitted by said X-ray source; and
computer means supplied with said camera signals for identifying the different projection angles of the 2D projections and for reconstructing a 3D image therefrom.
1 Assignment
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Accused Products
Abstract
An X-ray system has an X-ray apparatus, an X-ray source and an X-ray receiver on a carrier that is adjustable relative to a subject to be examined for registering 2D projections of a region of the subject from different projection angles with subsequent 3D image reconstruction of the region of the subject, and a position acquisition arrangement having at least one camera allocated to the X-ray apparatus that follows the movements of the X-ray apparatus, and having a position indicator arranged separate from the X-ray apparatus onto which the camera is directed for determining the positions of the X-ray source and the X-ray receiver and for determining the different projection angles of the 2D projections for the 3D image reconstruction. The camera and the position indicator are arranged outside the X-ray beam emanating from the X-ray source.
42 Citations
9 Claims
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1. An X-ray system comprising:
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an X-ray source which emits an X-ray beam; an X-ray receiver on which said X-ray beam is incident; means for moving said X-ray source and said X-ray receiver relative to an examination subject for obtaining a plurality of 2D projections of a region of the subject from a plurality of different projection angles, each of said projection angles having a unique projection geometry of the X-ray source and the X-ray receiver associated therewith, said X-ray source, said X-ray receiver and said means for moving comprising an X-ray apparatus; a camera allocated to said X-ray apparatus for following movements of said X-ray apparatus, said camera having a field of view and producing camera signals; a position indicator disposed separate from said X-ray apparatus and in said field of view of said camera, said position indicator producing information in said camera signal identifying the projection geometry for each of said different projection angles of said 2D projections, said camera and said position indicator being disposed outside of said X-ray beam emitted by said X-ray source; and computer means supplied with said camera signals for identifying the different projection angles of the 2D projections and for reconstructing a 3D image therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification