Imaging system and method for large-volume 3D images

The invention relates to an imaging system (R) with a beam source (Q) and a detector (DV), which is prepared to perform a scan, while the beam source (Q) along a circular or helical first trajectory (BK1Q) (an orbital axis OA) is performed while a rectangular sensor surface (SF) of the detector (RD) at a distance (SID) (to the beam source Q) along a circular or helical second path curve (BK2S) about the orbital axis (OA) is guided. During the scan, a yaw angle (GW) between a mid-perpendicular (MS) of the sensor surface (SF) and the rotation plane (RE), in which the beam source (Q) is currently located, has a value of greater than 0 ° and at the same time smaller than 90 °. Moreover, the invention corresponding method (100) for obtaining projection data relates.