PROVIDING A RESULT DATASET

Abstract

A computer-implemented method for providing a result dataset, comprising: acquisition of at least one projection mapping pair of an object under examination by a medical biplane imaging device, wherein the at least one projection mapping pair contains a first and a second projection mapping of the object under examination, that map the object under examination simultaneously in a first and a second detection plane, wherein the first and second detection plane are arranged non-parallel to one another, determination of a correction model for the correction of an artifact and/or a movement, wherein the artifact and/or the movement is mapped simultaneously in the at least one first and the at least one second projection mapping, wherein the at least one projection mapping pair specifies a consistency condition for the determination of the correction model, reconstruction of the result dataset at least from the at least one first projection mapping and on the basis of the correction model, provision of the result dataset.

Claims

1. A computer-implemented method for provision of a result dataset, the method comprising: acquiring at least one projection mapping pair of an object under examination by a medical biplane imaging device, wherein the at least one projection mapping pair contains a first projection mapping and a second projection mapping of the object under examination that map the object under examination simultaneously in a first detection plane and a second detection plane, wherein the first detection plane and the second detection plane are arranged non-parallel to one another; determining a correction model for the correction of an artifact, a movement, or the artifact and the movement, wherein the artifact, the movement, or the artifact and the movement is mapped simultaneously in the first projection mapping and the second projection mapping, wherein the at least one projection mapping pair specifies a consistency condition for the determination of the correction model; reconstructing the result dataset at least from the first projection mapping and on a basis of the correction model; and providing the result dataset.

2. The method of claim 1, wherein multiple projection mapping pairs of the object under examination are acquired that map a movement of the object under examination in a time-resolved manner, wherein the multiple projection mapping pairs specify the consistency condition for the determination of the correction model along at least a temporal dimension.

3. The method of claim 2, further comprising: receiving a physiological movement signal that maps the movement of the object under examination, wherein the determination of the correction model is additionally based on the physiological movement signal.

4. The method of claim 1, wherein the medical biplane imaging device is configured as a medical biplane X-ray device.

5. The method of claim 4, wherein the first projection mapping is acquired with a higher X-ray dose compared to the second projection mapping.

6. The method of claim 1, wherein the artifact comprises a scattered radiation artifact, a bean hardening artifact, or the scatter radiation artifact and the beam hardening artifact, wherein the first projection mapping and the second projection mapping of the at least one projection mapping pair specifies pairwise the consistency condition for the determination of the correction model.

7. The method of claim 1, wherein the result dataset is additionally reconstructed from the second projection mapping.

8. The method of claim 1, wherein multiple projection mapping pairs of the object under examination are acquired around a common axis of rotation.

9. The method of claim 1, wherein multiple projection mapping pairs of the object under examination are acquired, wherein the first detection plane and the second detection plane of a projection mapping pair include a constant angle to one another.

10. The method of claim 9, wherein the first detection plane and the second detection planes of a projection mapping pair include an angle of between 50° and 130° to one another.

11. The method of claim 1, wherein multiple projection mapping pairs of the object under examination are acquired around a common isocenter.

12. The method of claim 1, wherein multiple projection mapping pairs of the object under examination are acquired, wherein the first projection mappings are acquired around a first isocenter and the second projection mappings around a second isocenter, wherein the first isocenter and the second isocenters are different.

13. The method of claim 1, wherein the determination of the correction model comprises an optimization of a consistency metric.

14. The method of claim 1, wherein at least one further projection mapping is acquired for the at least one projection mapping pair with a further imaging unit, which maps the object under examination simultaneously in a further detection plane, wherein the further detection plane is arranged non-parallel to the first detection plane and the second detection plane, wherein the consistency condition for the determination of the correction model is additionally specified using the at least one further projection mapping and the result dataset is additionally reconstructed from the at least one further projection mapping.

15. A medical biplane imaging device comprising: a first X-ray unit comprising a first X-ray source and a first X-ray detector; wherein the first X-ray unit is configured for an acquisition of a first projection mapping of an object under examination; a second X-ray unit comprising a second X-ray source and a second X-ray detector, wherein the second X-ray unit is configured for an acquisition of a second projection mapping of the object under examination, wherein the first projection mapping and the second projection mapping of the object under examination map the object under examination simultaneously in a first detection plane and a second detection plane, wherein the first detection plane and the second detection plane are arranged non-parallel to one another; and a processing unit configured to: determine a correction model for the correction of an artifact, a movement, or the artifact and the movement, wherein the artifact, the movement, or the artifact and the movement is mapped simultaneously in the first projection mapping and the second projection mapping, wherein the first projection mapping and the second projection mapping specifies a consistency condition for the determination of the correction model; reconstruct a result dataset at least from the first projection mapping and on a basis of the correction model; and provide the result dataset.

17. A non-transitory computer readable storage medium comprising a set of computer-readable instructions stored thereon for provision of a result dataset, the instructions which, when executed by at least one processor cause the processor to: acquire at least one projection mapping pair of an object under examination by a medical biplane imaging device, wherein the at least one projection mapping pair contains a first projection mapping and a second projection mapping of the object under examination that map the object under examination simultaneously in a first detection plane and a second detection plane, wherein the first detection plane and the second detection plane are arranged non-parallel to one another; determine a correction model for the correction of an artifact, a movement, or the artifact and the movement, wherein the artifact, the movement, or the artifact and the movement is mapped simultaneously in the first projection mapping and the second projection mapping, wherein the at least one projection mapping pair specifies a consistency condition for the determination of the correction model; reconstruct the result dataset at least from the first projection mapping and on a basis of the correction model; and provide the result dataset.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0075] FIGS. 1, 2, and 3 depict schematic representations of different embodiments of a method for providing a result dataset.

[0076] FIG. 4 depicts a schematic representation of a medical biplane X-ray device according to an embodiment.

DETAILED DESCRIPTION

[0077] FIG. 1 schematically depicts an embodiment of a method for the provision PROV-ED of a result dataset ED. At least one projection mapping pair PP of an object under examination may be acquired ACQ-PP by a medical biplane imaging device. The at least one projection mapping pair PP may have a first PP1 and a second projection mapping PP2 of the object under examination, that maps the object under examination simultaneously in a first and a second detection plane. the first and the second detection plane are arranged non-parallel to one another. Furthermore, a correction model CM may be determined DET-CM for the correction of an artifact and/or a movement simultaneously mapped in the at least one first PP1 and the at least one second projection mapping PP2. the at least one projection mapping pair PP may specify a consistency condition for the determination DET-CM of the correction model CM. Further, the result dataset ED may be reconstructed RECO-ED at least from the at least one first projection mapping PP1 and on the basis of the correction model CM. The result dataset ED may then be provided PROV-ED.

[0078] The medical biplane imaging device may be configured as a medical biplane X-ray device. Moreover, the artifact may include a scattered radiation artifact and/or a radiation filtration artifact. the at least one first PP1 and the at least one second projection mapping PP2 of the at least one projection mapping pair PP may specify a consistency condition for the paired determination DET-CM of the correction model CM.

[0079] The determination DET-CM of the correction model CM may include an optimization of a consistency metric. The result dataset ED may additionally be reconstructed RECO-ED from the at least one second projection mapping PP2.

[0080] Multiple projection mapping pairs PP of the object under examination may be acquired ACQ-PP around a common axis of rotation, for example a common isocenter. Moreover, the first and the second detection planes in each case of a projection mapping pair may have a constant angle, for example of between 50° and 130°, for example 90°, to one another. For example, the multiple projection mapping pairs PP, for example the first PP1 and second projection mappings PP2, may be acquired along equidistant projection directions within a specified projection angular range. For a total of N first PP1 and second projection mappings PP2, N/2 projection mapping pairs may be formed. The i.sup.th of the N/2 projection mapping pairs may include the projection mapping with index i as the first projection mapping and the projection mapping with the index i+N/2 as the second projection mapping. the first and second detection planes of the N/2 projection mapping pairs may have a constant angle to one another, which corresponds to half the projection angular range.

[0081] FIG. 2 depicts a schematic representation of an embodiment of a proposed method for the provision PROV-ED of a result dataset ED. at least one further projection mapping PF which maps the object under examination simultaneously in a further detection plane may be acquired for the at least one projection mapping pair PP by a further imaging unit. the further detection plane is arranged non-parallel to the first and second detection plane. The consistency condition for the determination DET-CM of the correction model CM may additionally be specified using the at least one further projection mapping PF. Alternatively or additionally the result dataset ED may additionally be reconstructed RECO-ED from the at least one further projection mapping PF.

[0082] FIG. 3 schematically depicts an embodiment of a proposed method for the provision PROV-ED of a result dataset ED. multiple projection mapping pairs PP of the object under examination may be acquired ACQ-PP, which map a movement of the object under examination in a time-resolved manner. the multiple projection mapping pairs PP may specify the consistency condition for the determination DET-CM of the correction model CM along at least one temporal dimension. Moreover, a physiological movement signal MS may be received RECO-MS, which maps the movement of the object under examination. The determination DET-CM of the correction model CM may additionally be based on the physiological movement signal MS.

[0083] The first projection mappings PP1 may be acquired ACQ-PP around a first isocenter and the second projection mappings PP2 around a second isocenter. the first and the second isocenter may be different.

[0084] FIG. 4 depicts a schematic representation of a medical biplane X-ray device, for example for a proposed medical biplane imaging device. The biplane X-ray device 7 includes a first X-ray unit 37.1 and a second X-ray unit 37.2. The first X-ray unit 37.1 for example includes a 6-axis articulated robot 16, to which a C-arm 38.1 is attached, which supports a first X-ray source 33.1 and a first X-ray detector 34.1. In the embodiment shown the second X-ray unit 37.2 includes a stand 17 that may be moved on rails, which supports a mobile C-arm 38.2, to which a second X-ray source 33.2 and a second X-ray detector 34.2 are attached.

[0085] The medical biplane X-ray device 7 may further include a provision unit PRVS. The medical biplane X-ray device 7 is configured to execute a form of embodiment of the proposed method for the provision PROV-ED of a result dataset ED.

[0086] For the acquisition ACQ-PP of the at least one projection mapping pair PP, for example the at least one first PP1 and the at least one second projection mapping PP2, the C-arm 38.1 of the first X-ray unit 37.1 and the C-arm 38.2 of the second X-ray unit 37.2 may be movably mounted around one or more axes. For the acquisition of the at least one projection mapping pair PP from the object under examination 31 arranged on a patient positioning facility 32, the provision unit PRVS may send a signal 24.1 and 24.2 to the first 33.1 and the second X-ray source 33.2. The first X-ray source 33.1 may then emit a first X-ray beam, for example a cone beam and/or fan beam and/or parallel beam. When, after an interaction with the object under examination 31, the first X-ray beam encounters a surface of the first X-ray detector 34.1, the first X-ray detector 34.1 may provide a signal 21.1 to the provision unit PRVS. Similarly, the second X-ray source 33.2 may emit a second X-ray beam. When, after an interaction with the object under examination 31, the second X-ray beam encounters a surface of the second X-ray detector 34.2, the second X-ray detector 34.2 may send a second signal 21.2 to the provision unit PRVS. The provision unit PRVS may for example, using the signal 21.1 and the second signal 21.2, receive the at least one projection mapping pair PP, for example the at least one first PP1 and the at least one second projection mapping PP2.

[0087] The biplane X-ray device 7, for example the angled arrangement of the first 37.1 and the second X-ray unit 37.2 to one another, enables an acquisition, for example a simultaneous acquisition, of the at least one first PP1 and the at least one second projection mapping PP2 from different projection directions, for example a simultaneous mapping of the object under examination 31 in the first and second detection plane.

[0088] Furthermore, the medical biplane X-ray device 7 may include an input unit 42, for example a keyboard, and/or a display unit 41, for example a monitor and/or a display. The input unit 42 may preferably be integrated into the display unit 41, for example in the case of a capacitive and/or resistive input display. control of the medical biplane X-ray device 7, for example of the method for the provision PROV-ED of a result dataset ED, may be enabled by an input by a user, for example a medical operative, at the input unit 42.

[0089] Further, the display unit 41 may be configured to display information and/or graphical displays of information on the medical biplane X-ray device 7 and/or the provision unit PRVS and/or further components. For this the provision unit PRVS may for example send a signal 25 to a display unit 41. For example the display unit 41 may be configured to display a graphical display of the result dataset ED.

[0090] To reduce a radiation dose during the acquisition ACQ-PP of the at least one projection mapping pair PP of the object under examination 31, the at least one first projection mapping PP1 may be acquired with a higher X-ray dose compared to the at least one second projection mapping PP2. The X-ray dose for the acquisition of the at least one second projection mapping PP2 may be less than an X-ray dose required for a diagnostic assessment.

[0091] The schematic representations contained in the figures described do not at all map scale or proportions.

[0092] In conclusion it is once again noted that the methods and apparatuses described in detail above relate solely to exemplary embodiments that may be modified by the person skilled in the art in a variety of ways, without departing from the scope of the invention. Further, the use of the indefinite article “a” or “an” does not rule out that the features in question may also be present multiple times. Likewise, the terms “unit” and “element” do not rule out that the components in question consist of multiple interacting subcomponents that if appropriate may also be distributed spatially.

[0093] It is to be understood that the elements and features recited in the appended claims may be combined in different ways to produce new claims that likewise fall within the scope of the present invention. Thus, whereas the dependent claims appended below depend from only a single independent or dependent claim, it is to be understood that these dependent claims may, alternatively, be made to depend in the alternative from any preceding or following claim, whether independent or dependent, and that such new combinations are to be understood as forming a part of the present specification.

[0094] While the present invention has been described above by reference to various embodiments, it may be understood that many changes and modifications may be made to the described embodiments. It is therefore intended that the foregoing description be regarded as illustrative rather than limiting, and that it be understood that all equivalents and/or combinations of embodiments are intended to be included in this description.