Phase-contrast X-ray imaging system for obtaining a dark-field image and a method therefor
AssigneesImec Vzw, Universiteit Antwerpen
InventorsJan De Beenhouwer, Jan Sijbers
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Abstract
A computer-implemented method for obtaining dark-field X-ray projection data of an object includes: obtaining a first set of X-ray projection data of the object at a first energy spectrum; the first set of X-ray projection data having a first attenuation component, a first phase component, and a first dark-field component; obtaining a second set of X-ray projection data of the object acquired at a second energy spectrum having a higher effective energy than the first energy spectrum; and extracting the dark-field projection data from the first set of X-ray projection data by the second set of X-ray projection data having a lower dark-field component contribution than the first set of X-ray projection data.
Claims15
A computer-implemented method for obtaining dark-field X-ray projection data of an object comprising:
- obtaining a first set of X-ray projection data of the object acquired at a first energy spectrum;
- the first set of X-ray projection data comprising a first attenuation component, a first phase component, and a first dark-field component;
- obtaining a second set of X-ray projection data of the object acquired at a second energy spectrum having a higher effective energy than the first energy spectrum;
- and
- extracting dark-field projection data from the first set of X-ray projection data by the second set of X-ray projection data having a lower dark-field component contribution than the first set of X-ray projection data.
An apparatus for obtaining dark-field X-ray projection data of an object, the apparatus comprising at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to perform:
- obtaining a first set of X-ray projection data of the object acquired at a first energy spectrum;
- the first set of X-ray projection data comprising a first attenuation component, a first phase component, and a first dark-field component;
- obtaining a second set of X-ray projection data of the object acquired at a second energy spectrum having a higher effective energy than the first energy spectrum;
- extracting dark-field projection data from the first set of X-ray projection data by the second set of X-ray projection data having a lower dark-field component contribution than the first set of X-ray projection data.
Dependencies are inferred from the claim text.