Method for determining X-ray image dataset and X-ray device
An image data set, X-ray technology, applied in image data processing, equipment for radiological diagnosis, image generation, etc., can solve problems such as difficult implementation
Pending Publication Date: 2018-04-20
SIEMENS HEALTHCARE GMBH
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[0010] However, the problem arises here that, from a technical point of view, the teaching of patent document DE 10 2012 205 245 A1 is very difficult to implement in practice, since the corresponding x-ray device requires a collimator that is dynamically changed over the entire acquisition period. Adjustment
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[0035] figure 1 with figure 2 The biplane x-ray system 1 according to the invention is shown in two different illustrations. The biplane x-ray device 1 comprises two C-shaped frames 2, 3 on which x-ray emitters 4, 5 and x-ray detectors with corresponding collimators 6, 7 are arranged oppositely 8,9. Here, the x-ray emitter 4 and the x-ray detector 8 form a first imaging device, and the x-ray emitter 5 and the x-ray detector 9 form a second imaging device. As is known in such a biplane x-ray device 1, the coordinate systems of the recording device are registered relative to each other at any time, because in figure 1 The control device 10 of the x-ray system 1 , shown only schematically in , always knows the relative position of the C-frames 2 , 3 and thus of the recording devices relative to each other, which means both spontaneous and extrinsic calibration.
[0036] The C-frame 2 is mounted on the bottom by means of the holding device 11 through the movement means enabli...
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The invention relates to a method for determining an X-ray image dataset of a target area (15) of an examination object. Projection images showing the target area (15) are taken from different projection directions along a recording trajectory by means of an X-ray device (1), and the projection images are utilized to reconstruct a higher-dimensional X-ray image dataset. A first part of the projection images collimated onto the target area (15) and a second part of the projection images showing the examination object non-truncated in at least one direction are recorded, so that from the secondpart of the projection images, at least one item of truncation information that is used in the reconstruction of the X-ray image dataset for reducing truncation artifacts is derived. The projection images are taken by the X-ray device (1). The X-ray device (1) includes at least two image taking gears that move independently and measure in coordinated systems recorded mutually. The image taking gears include X-ray emitters (4, 5) provided with at least one matched collimator (6, 7) and X-ray detectors (8, 9).
Description
technical field [0001] The invention relates to a method for determining an x-ray image data set of a target region of an examination object, wherein projection images showing the target region are recorded from different projection directions along an acquisition trajectory by means of an x-ray device and a more accurate reconstruction is made from these projection images. High-dimensional x-ray image data set, wherein a first part of the projection image is captured collimated towards the target area, a second part of the projection image shows the examination object untruncated in at least one direction, so that it is deduced from the second part of the projection image At least one truncation information is generated, the truncation information is used to reduce truncation artifacts when reconstructing the x-ray image data set. The invention also relates to an x-ray device. Background technique [0002] The determination of high-dimensional image data sets from low-dime...
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IPC IPC(8): A61B6/03
CPCA61B6/032A61B6/4441A61B6/4452A61B6/5205A61B6/06A61B6/4014G06T11/005G06T2211/432A61B6/5258A61B6/4464
Inventor S.鲍尔
Owner SIEMENS HEALTHCARE GMBH