Determining a scattered radiation estimation for an x-ray beam detector

A computer-implemented method for determining a scattered radiation estimation for an X-ray beam detector with a plurality of detector elements, wherein an anti-scatter grid is in front of the X-ray beam detector, wherein in at least one direction, at least two respective detector elements are between respective adjacent lamellae of the anti-scatter grid, the method comprising:

• receiving detector data and dividing the detector data into at least two groups of detector data based on a position of the detector elements, from which the detector data respectively originates, relative to a nearest respective lamella of the anti-scatter grid;
• determining a scattered radiation distribution as a scattered radiation term for each of the groups of detector data, the scattered radiation distribution providing an estimate of a scattering based on the detector data;
• convolving the scattered radiation term of each of the groups with a respective convolutional kernel individually adjusted for each group to generate a plurality of convolved scattered radiation terms corresponding to a number of the groups;
• and
• merging the scattered radiation distributions according to the convolved scattered radiation terms to obtain the scattered radiation estimation.