A computed tomography (CT) system includes a rotatable gantry having an opening to receive an object to be scanned, an x-ray tube having an anode, the x-ray tube positioned on the rotatable gantry to generate x-rays from a first focal spot at a first z-location, and from a second focal spot at a second z-location, a pixelated detector positioned on the rotatable gantry to receive the x-rays from the first z-location and from the second z-location, and a computer. The computer is programmed to acquire a first dataset in a fan geometry at a first z-location, acquire a second dataset in the fan geometry at a second z-location, and reconstruct an image based on the first dataset and the second dataset, wherein the reconstruction is performed without combining the first dataset and the second dataset into one dataset with a single geometry from which the image reconstruction is performed.
