The present invention relates to an imaging apparatus and a corresponding imaging method. To avoid the disadvantages of a pile-up effect in the detection unit, an imaging apparatus is proposed comprising a radiation source (2) for emitting radiation from a focal region (20) through an imaging area (5), a detection unit (6) for detecting radiation from said imaging area (5), said detection unit comprising an anti-scatter grid (62) and a detector (61), a gantry (1) to which said radiation source (2) and said detection unit (6) are mounted and which allows rotation of said radiation source (2) and said detection unit (6) around said imaging area, and a controller (9) for controlling said detection unit (6) to detect radiation at a plurality of projection positions during rotation around said imaging area and for manipulating the position, setting and/or orientation of at least a part of said radiation source (2) and/or said detection unit (6) at first projection positions (80) so that the radiation incident on the detector (61) at said first projection positions is attenuated by said anti-scatter grid (62) to a larger extent compared to second projection positions (80) representing the remaining projection positions.La présente invention concerne un appareil dimagerie et un procédé dimagerie correspondant. Pour éviter les inconvénients dun effet dempilement dans lunité de détection, linvention concerne un appareil dimagerie comportant une source de rayonnement (2) pour émettre un rayonnement à partir dune région focale (20) à travers une zone dimagerie (5), une unité de détection (6) pour détecter le rayonnement provenant de ladite zone dimagerie (5), ladite unité de détection comprenant une grille anti-diffusion (62) et un détecteur (61), un portique (1) sur lequel ladite source de rayonnement (2) et ladite unité de détection (6) sont montées et qui permet la rotation de ladite source de rayonnement (2) et de ladite unité de détection (6) autour de ladite zone dimager
