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AssigneeOtto-Von-Guericke-Universitaet Magdeburg
InventorsThomas Hoffmann, Tim Pfeiffer, Robert Frysch, André Mewes, Benjamin Fritsch, Georg Rose
Estimating the term…
Method for determining an X-ray image dataset of a target region of an object to be examined, wherein projection images showing the target region are captured by an X-ray detector and the X-ray image dataset is reconstructed from the projection images, wherein a first portion of the projection images is captured so as to be collimated onto the target region by the target region being irradiated with X-ray radiation by an X-ray device through at least one main radiation opening of a collimator assembly. The invention also relates to a corresponding apparatus for determining an X-ray image dataset of a target region of the object to be examined. The invention generally relates to the field of medical X-ray imaging, in particular with the aim of acquiring projections for reconstructing 2D computed-tomography images.
Method for determining an X-ray image data set of a target area of an examination object, the method comprising the steps of:
Apparatus for determining an X-ray image data set of a target area of an examination object, having an X-ray detector for taking projection images showing the target area and a reconstruction means for reconstructing the X-ray image data set from the projection images, further having an X-ray device and a collimator assembly having at least one main radiation opening for taking a first part of the projection images, which are taken collimated onto the target area by the target area being irradiated with X-ray radiation by means of an X-ray device, characterized in that the collimator assembly has one or several secondary radiation openings, which are arranged in one or several collimator apertures and which surround the main radiation opening or are adjacent to it, wherein a second part of the projection images is taken by irradiating marginal regions of the target area with X-ray radiation through one or several secondary radiation openings, wherein the reconstruction means is arranged to determine the X-ray image data set from the first part of the projection images with the aid of the second part of the projection images to reduce truncation artefacts in the X-ray image data set.
Dependencies are inferred from the claim text.