Abstract: The invention relates to a computed tomography method in which an examination zone is irradiated along a circular trajectory by a fan-shaped radiation beam. Radiation coherently scattered in the examination zone is measured by a detector unit, the variation in space of the scatter intensity in the examination zone being reconstructed from said measuring values. Reconstruction is performed by back projection in a volume which is defined by two linearly independent vectors of the rotational plane and a wave vector transfer.

Abstract: The invention relates to a method of and an X-ray device for forming a 3D image (B) of an object (13) to be examined by combining at least two reconstruction images (S1, S2) by weighted addition, said reconstruction images being acquired notably by means of an X-ray device (1) and each reconstruction image (S1, S2) being weighted by a respective weighting function (A1, A2) that describes at least approximately the distribution of noise and/or artefacts in the relevant reconstruction image. The image quality of the resultant 3D image is thus significantly enhanced.