Providing a 3D image dataset
A computer-implemented method for providing a 3D image dataset includes identifying an acquisition plan and an acquisition trajectory. The method further includes determining a collimator configuration of a collimation unit for each acquisition positioning, wherein each collimator configuration specifies a spatial arrangement of at least one filter element of the collimation unit such that: X-ray radiation that is emitted by the X-ray source and illuminates a detector row without earlier passing through the volume of interest is filtered, and X-ray radiation that is emitted by the X-ray source and illuminates at least part of a detector row after passing through the volume of interest is transmitted. The method further includes acquiring the X-ray projection images of the object under examination, wherein the collimation unit is adjusted based on the collimator configurations; providing the 3D image dataset by reconstruction from the X-ray projection images.
1 . A computer-implemented method for providing a three-dimensional (3D) image dataset, the method comprising:
identifying an acquisition plan comprising information relating to a volume of interest to be imaged of an object under examination and relating to an acquisition trajectory, wherein the acquisition trajectory specifies a plurality of acquisition positionings of an acquisition arrangement for acquiring X-ray projection images of the object under examination, wherein the acquisition arrangement comprises an X-ray source, an X-ray detector, and a collimation unit, and wherein the X-ray detector has a plurality of detector rows, each detector row comprising a plurality of detector pixels;
determining a collimator configuration of the collimation unit for each acquisition positioning of the acquisition positionings of the acquisition arrangement, wherein each collimator configuration specifies a spatial arrangement of at least one filter element of the collimation unit such that: (1) X-ray radiation that is emitted by the X-ray source and configured to illuminate a detector row without earlier passing through the volume of interest is filtered by one or more filter elements of the at least one filter element, and (2) X-ray radiation that is emitted by the X-ray source and configured to illuminate at least part of the detector row after passing through the volume of interest is transmitted;
acquiring the X-ray projection images of the object under examination by the acquisition arrangement in accordance with the acquisition plan, wherein the collimation unit is adjusted based on the collimator configurations; and
providing the 3D image dataset by reconstruction from the X-ray projection images.
2 . The method of claim 1 , wherein the collimation unit has at least one at least semi-transparent filter element and at least one non-transparent filter element,
wherein the X-ray radiation is filtered by the at least one non-transparent filter element and transmitted by the at least one at least semi-transparent filter element.
3 . The method of claim 2 , wherein the collimation unit has a plurality of filter elements, and
wherein each collimator configuration of the collimator configurations specifies a relative positioning of the plurality of filter elements.
4 . The method of claim 3 , wherein the identifying of the acquisition plan comprises receiving pre-captured planning image data and/or a planning model of the object under examination, and
wherein the volume of interest and/or the acquisition trajectory are determined based on the planning image data and/or the planning model.
5 . The method of claim 4 , wherein the determining of the volume of interest and/or the determining of the acquisition trajectory is based on one or more of artificial intelligence, annotation of the planning image data, annotation of the planning model as input data.
6 . The method of claim 1 , wherein the collimation unit has a plurality of filter elements, and
wherein each collimator configuration of the collimator configurations specifies a relative positioning of the plurality of filter elements.
7 . The method of claim 1 , wherein the identifying of the acquisition plan comprises receiving pre-captured planning image data and/or a planning model of the object under examination, and
wherein the volume of interest and/or the acquisition trajectory are determined based on the planning image data and/or the planning model.
8 . The method of claim 7 , wherein the determining of the volume of interest and/or the determining of the acquisition trajectory is based on one or more of artificial intelligence, annotation of the planning image data, annotation of the planning model as input data.
9 . The method of claim 1 , wherein the identifying of the acquisition plan comprises acquiring at least one initial X-ray projection image of the object under examination in accordance with an initial acquisition plan, and
wherein the volume of interest and/or the acquisition trajectory are determined based on the at least one initial X-ray projection image.
10 . The method of claim 9 , wherein the identifying of the acquisition plan, the determining of the collimator configurations, and the acquiring of the at least one X-ray projection image are executed repeatedly,
wherein, in the repeated execution of the identifying of the acquisition plan, the X-ray projection images acquired so far are provided as the at least one initial X-ray projection image, and a most recently identified acquisition plan is provided as the initial acquisition plan.
11 . The method of claim 10 , wherein the determining of the volume of interest and/or of the acquisition trajectory is based on one or both of artificial intelligence and annotation of the at least one initial X-ray projection image as input data.
12 . The method of claim 9 , wherein the determining of the volume of interest and/or of the acquisition trajectory is based on one or both of artificial intelligence or annotation of the at least one initial X-ray projection image as input data.
13 . The method of claim 1 , wherein the identifying of the acquisition plan comprises identifying at least one X-ray sensitive region of the object under examination, and
wherein the collimator configurations specify the spatial arrangement of the at least one filter element additionally such that X-ray radiation that is emitted by the X-ray source and travels at least partially inside the X-ray sensitive region is filtered.
14 . The method of claim 1 , wherein the acquisition trajectory comprises a rotation of the acquisition arrangement about an axis of rotation.
15 . A medical X-ray device comprising:
an acquisition arrangement having an X-ray source, an X-ray detector, and a collimation unit,
wherein the collimation unit comprises at least one filter element,
wherein the X-ray detector has a plurality of detector rows, each detector row comprising a plurality of detector pixels, and
wherein the medical X-ray device is configured to:
identify an acquisition plan comprising information relating to a volume of interest to be imaged of an object under examination and relating to an acquisition trajectory, wherein the acquisition trajectory specifies a plurality of acquisition positionings of the acquisition arrangement for acquiring X-ray projection images of the object under examination;
determine a collimator configuration of the collimation unit for each acquisition positioning of the acquisition positionings of the acquisition arrangement, wherein each collimator configuration specifies a spatial arrangement of the at least one filter element of the collimation unit such that: (1) X-ray radiation that is emitted by the X-ray source and configured to illuminate a detector row without earlier passing through the volume of interest is filtered by one or more filter elements of the at least one filter element, and (2) X-ray radiation that is emitted by the X-ray source and configured to illuminate at least part of the detector row after passing through the volume of interest is transmitted;
acquire the X-ray projection images of the object under examination by the acquisition arrangement in accordance with the acquisition plan, wherein the collimation unit is adjusted based on the collimator configurations; and
provide a three-dimensional (3D) image dataset by reconstruction from the X-ray projection images.
16 . A non-transitory computer readable medium comprising a computer program, which is configured to be loaded directly into a memory of a provider unit, and which contains program segments that, when executed by the provider unit, are configured to cause the provider unit to:
identify an acquisition plan comprising information relating to a volume of interest to be imaged of an object under examination and relating to an acquisition trajectory, wherein the acquisition trajectory specifies a plurality of acquisition positionings of an acquisition arrangement for acquiring X-ray projection images of the object under examination, wherein the acquisition arrangement comprises an X-ray source, an X-ray detector, and a collimation unit, and wherein the X-ray detector has a plurality of detector rows, each detector row comprising a plurality of detector pixels;
determine a collimator configuration of the collimation unit for each acquisition positioning of the acquisition positionings of the acquisition arrangement, wherein each collimator configuration specifies a spatial arrangement of at least one filter element of the collimation unit such that: (1) X-ray radiation that is emitted by the X-ray source and configured to illuminate a detector row without earlier passing through the volume of interest is filtered by one or more filter elements of the at least one filter element, and (2) X-ray radiation that is emitted by the X-ray source and configured to illuminate at least part of the detector row after passing through the volume of interest is transmitted;
acquire the X-ray projection images of the object under examination by the acquisition arrangement in accordance with the acquisition plan, wherein the collimation unit is adjusted based on the collimator configurations; and
provide a three-dimensional (3D) image dataset by reconstruction from the X-ray projection images.