Noise reduction in tomograms

The invention relates to a method for reducing noise in a tomogram and/or volume rendering of at least one object (24). The noise can occur when scattered radiation artefacts are corrected. At least one tomogram (Funcorr) that is affected by scattered radiation and at least one preliminary tomogram (Fcorr) that has been corrected by a defined correction method are produced from a plurality of projection image datasets (P1, P2, P3) that are affected by scattered radiation. The aim of the invention is to reduce the noise emerging when scattered radiation artefacts are corrected. For this purpose, the noise is selectively smoothened by means of a filter based on an edge contour of the at least one object, which contour is rendered in the tomogram (Funcorr) that is affected by scattered radiation. 本发明涉及种用于减少至少个对象(24)的断层图像和/或体绘制中的噪声的方法。噪声可以是在校正散射伪影时形成的。在该方法中，首先从多个受散射影响的投影图像数据组(P1,P2,P3)中形成至少个受散射影响的断层图像(Funcorr)和至少个初步的、借助预先给出的校正方法校正过的断层图像(Fcorr)。本发明基于如下任务，即减少在校正散射伪影时出现的噪声。为此，基于至少个对象的在受散射影响的断层图像(Funcorr)中绘制的边缘轮廓，借助滤