1. A method for imaging with a radiotherapy device, the radiotherapy device comprising an imaging apparatus that is movably mounted, the imaging apparatus comprising an X-ray source and an oppositely disposed X-ray detector, the method comprising: storing a plurality of different therapeutic beam directions in a treatment plan; setting a first imaging direction based on the treatment plan such that the first imaging direction corresponds to a first therapeutic beam direction stored in the treatment plan; preparing a first image with the imaging apparatus from the first imaging direction, the preparing of the first image being performed before a therapeutic beam application along the first therapeutic beam direction; moving the imaging apparatus to a position that permits the preparation of a second image from a second imaging direction, which extends at an angle to the first imaging direction, and permits the therapeutic beam application along the first therapeutic beam direction; preparing the second image with the imaging apparatus from the second imaging direction, the preparing of the second image being performed after the therapeutic beam application; and verifying a position of an object to be irradiated using the first image and the second image.