1. A computer tomography method for the detection of an examination zone, which is exposed at least partly to a cyclical movement, which method comprises the following steps: a) Generation of a beam traversing the examination zone with a radiation source rotating several times around the examination zone, b) Acquisition of a set of measured values, which depend on the intensity of the beam beyond the examination zone, with a detector unit during the rotation of the radiation source with simultaneous recording of a signal representing the cyclical movement, c) Reconstruction of a rough image from the measured values, d) Selection of a region within the area represented by the rough image, e) Optimization of reconstruction windows in predefinable position within the movement cycles in such a manner that the reconstruction windows are, on the one hand, smallest possible and, on the other hand, so large that each voxel of the region within the reconstruction windows is struck by the beam from an angle range sufficient for the reconstruction, f) Reconstruction of an image of the region from the measured values acquired within the reconstruction windows.