X-ray imaging method and x-ray imaging system
A method for recording an x-ray image with an x-ray imaging system having an x-ray source and an x-ray detector is provided. The x-ray source has a plurality of x-ray emitters arranged alongside one another. Each x-ray emitter is assigned to a part area of the x-ray detector. The x-ray beam generated by the x-ray emitter is collimated onto the assigned part area. A first x-ray emitter is activated for emitting a first x-ray beam onto a first part area and image data of the first part area is read out. Subsequently a further x-ray emitter for emitting a further x-ray beam onto a further part area of is activated and image data of the further part area is read out. The steps are repeated until image data for all part areas of the x-ray detector is read out. The read out image data is combined into an x-ray image.
1. A method for recording an x-ray image of an object with an x-ray imaging system having an x-ray source and an x-ray detector, wherein the x-ray source comprises a plurality of x-ray emitters arranged next to each other for emitting x-ray beams, comprising:
assigning a part area of the x-ray detector to each of the x-ray emitters respectively;
activating a first x-ray emitter for emitting a first x-ray beam collimated onto a first part area of the x-ray detector assigned to the first x-ray emitter;
reading out image data of the first part area of the x-ray detector;
subsequently activating a further x-ray emitter for emitting a further x-ray beam collimated onto a further part area of the x-ray detector assigned to the further x-ray emitter;
reading out image data of the further part area of the x-ray detector;
subsequently activating the rest of the x-ray emitters for emitting the rest of the x-ray beams collimated onto part areas of the x-ray detector assigned to the rest of the x-ray emitters respectively until image data for all part areas of the x-ray detector are read out; and
combining the read out image data for all part areas of the x-ray detector into the x-ray image.
2. The method as claimed in claim 1 , wherein each of the x-ray beams is collimated into a slot shape.
3. The method as claimed in claim 1 , wherein each of the part areas comprises one to ten pixel lines of the x-ray detector.
4. The method as claimed in claim 1 , wherein the all part areas of the x-ray detector together generates an overall surface of the x-ray detector.
5. The method as claimed in claim 1 , wherein the x-ray emitters adjacent to each other are activated sequentially in turn.
6. The method as claimed in claim 1 , wherein areas of the x-ray detector differing from the emitted part areas are not read out or discarded after reading out.
7. The method as claimed in claim 1 , wherein the x-ray emitters are arranged adjacent to each other and assigned to adjacent part areas of the x-ray detector.
8. The method as claimed in claim 1 , wherein the x-ray detector is irradiated and read out by a scan.
9. A x-ray imaging system for recording an x-ray image of an object, comprising:
an x-ray source comprising a plurality of x-ray emitters arranged next to each other for emitting x-ray beams;
an x-ray detector comprising a plurality of part areas being assigned to the x-ray emitters respectively for reading out image data; and
a collimator for forming the x-ray beams into slots so that the x-ray beams are collimated onto the part areas of the x-ray detector assigned to the x-ray emitters respectively,
wherein the x-ray emitters adjacent to each other are configured to be sequentially activated one after another for emitting the x-ray beams collimated onto the part areas of the x-ray detector assigned to the x-ray emitters respectively, and
wherein the x-ray detector is configured to subsequently read out the image data of the part areas for combining the image data of the part areas into the x-ray image.
10. The x-ray imaging system as claimed in claim 9 , wherein the x-ray emitters comprise field emission guns having field emission cathodes.
11. The x-ray imaging system as claimed in claim 10 , wherein the field emission cathodes are carbon nanotubes.
12. The x-ray imaging system as claimed in claim 10 , wherein the field emission guns are arranged in a linear array.