Abstract: According to one or more example embodiments, a shim apparatus for an MR apparatus includes a specimen holder, the specimen holder including a plurality of MR reference specimens, the MR reference specimens being on the specimen holder; a frame; a shaft, the shaft being mounted on the frame such that the shaft is rotatable about an axis of rotation, the specimen holder being non-rotatably connected to the shaft, the MR reference specimens being spaced apart from the axis of rotation; a drive unit, the drive unit being configured to output a torque, the drive unit being electrical or pneumatic; and a gear unit, the gear unit being configured to transfer the torque output by the drive unit to the shaft and to rotate or swivel the MR reference specimens about the axis of rotation.

Abstract: In a method for generation of an x-ray image of a subject in a patient, a first x-ray image showing the subject in the patient is acquired. A subject image containing only image information in the imaging region of the subject is created from the first x-ray image by image regions of the first x-ray image that do not belong to the imaging region of the subject being removed. A second x-ray image of the patient is acquired in the region of the subject. The subject image is associated with the second x-ray image with positional accuracy and both are merged into a sum image.