Computed tomography system and method for operating a computed tomography system

A computed tomography system comprising:

• an annular x-ray source having a plurality of partial x-ray sources around an examination region in the form of a first circle or a first part-circle;
• and
• a detector annulus having a plurality of x-ray detectors around the examination region in the form of a second circle or a second part-circle, wherein the computed tomography system is configured to,
• activate at least some of the partial x-ray sources individually during a computed tomography scan using a static x-ray source and a static detector annulus, and
• generate absorption profiles of an object in the examination region from a plurality of directions using the x-ray detectors,
• wherein the computed tomography system is further configured to at least one of,
• generate at least a first x-ray spectrum using a first group of the partial x-ray sources and a second x-ray spectrum, distinguishable from the first x-ray spectrum, using a second group of the partial x-ray sources during the computed tomography scan, or
• record an x-ray signal in a spectrally distinguishable manner using the x-ray detectors.