A system includes emission of first electrons toward a first focal spot using an X-ray tube located at a first position, emission of first radiation from the first focal spot toward an object, acquisition of a first projection of the object based on the emitted first radiation using a computed tomography radiation detector, emission of second electrons toward a second focal spot using the X-ray tube located at the first position, emission of second radiation from the second focal spot toward the object, acquisition of a second projection of the object based on the emitted second radiation using the computed tomography radiation detector, and generation of an image of the object based on the first projection and the second projection.