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US 2025/0143659 A1Published application
Method for x-ray imaging, x-ray imaging system, and computer program product
AssigneeSiemens Healthineers AG
InventorsBoris Stowasser, Philipp Bernhardt
Life of this patent
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Abstract
In an X-ray imaging procedure, an input image and an input mask image are generated on the basis of first and second detector data of an X-ray flat panel detector. By applying noise suppression, a mask signal image and a signal image are generated on the basis thereof. By calculating the difference between the signal image and the mask signal image, a subtraction image is generated. The subtraction image is scaled so that a number of pixels is increased in a first image direction. A results image is generated in which the scaled subtraction image and a noise image are added together.
Claims15
A method for X-ray imaging, the method comprising:
- receiving first detector data from an X-ray flat panel detector;
- generating an input mask image using the first detector data, wherein the input mask image shows a region to be mapped of an object in a first state;
- receiving second detector data from the X-ray flat panel detector;
- generating an input image using the second detector data, wherein the input image shows the region to be mapped of the object in a second state;
- generating a mask signal image by applying noise suppression to the input mask image;
- generating a signal image by applying noise suppression to the input image;
- generating a subtraction image by calculating a difference between the signal image or an image dependent on the signal image and the mask signal image or an image dependent on the mask signal image;
- generating a scaled subtraction image by applying an interpolation method such that, at least in a first image direction, a number of pixels of the scaled subtraction image is greater than a number of pixels of the subtraction image;
- and
- generating a results image in which the scaled subtraction image and a noise image are added together.
7 more elements
A data processing device comprising:
- at least one computing unit configured to:
- receive first detector data from an X-ray flat panel detector;
- generate an input mask image using the first detector data, wherein the input mask image shows a region to be mapped of an object in a first state;
- receive second detector data from the X-ray flat panel detector;
- generate an input image using the second detector data, wherein the input image shows the region to be mapped of the object in a second state;
- generate a mask signal image by applying noise suppression to the input mask image;
- generate a signal image by applying noise suppression to the input image;
- generate a subtraction image by calculating a difference between the signal image or an image dependent on the signal image and the mask signal image or an image dependent on the mask signal image;
- generate a scaled subtraction image by applying an interpolation method such that, at least in a first image direction, a number of pixels of the scaled subtraction image is greater than a number of pixels of the subtraction image;
- and
- generate a results image in which the scaled subtraction image and a noise image are added together.
8 more elements
An X-ray imaging system comprising:
- an X-ray source;
- an X-ray flat panel detector;
- and
- a data processing device having at least one computing unit configured to:
- actuate the X-ray source to emit X-ray radiation in a direction of a region to be mapped of an object, while the object is in a first state;
- actuate the X-ray source to emit further X-ray radiation in the direction of the region to be mapped of the object, while the object is in a second state;
- and
- receive first detector data from the X-ray flat panel detector from portions of the X-ray radiation passing through the region to be mapped of the object;
- generate an input mask image using the first detector data, wherein the input mask image shows the region to be mapped of the object in the first state;
- receive second detector data from the X-ray flat panel detector from portions of the X-ray radiation passing through the region to be mapped of the object;
- generate an input image using the second detector data, wherein the input image shows the region to be mapped of the object in the second state;
- generate a mask signal image by applying noise suppression to the input mask image;
- generate a signal image by applying noise suppression to the input image;
- generate a subtraction image by calculating a difference between the signal image or an image dependent on the signal image and the mask signal image or an image dependent on the mask signal image;
- generate a scaled subtraction image by applying an interpolation method such that, at least in a first image direction, a number of pixels of the scaled subtraction image is greater than a number of pixels of the subtraction image;
- and
- generate a results image in which the scaled subtraction image and a noise image are added together.
14 more elements
Dependencies are inferred from the claim text.