1. A computed tomography reconstruction method comprising: concurrently emitting radiation from at least two x-ray sources rotating about an imaging region through the imaging region and detecting with corresponding sets of detectors projection data, which includes primary radiation emitted by a corresponding one of the at least two x-ray sources and cross scatter radiation emitted by the other of the at least two x-ray sources; switching the output state of each of the at least two x-ray sources within a plurality of respective cross scatter sampling intervals and detecting with a corresponding one of the sets of detectors cross scatter radiation emitted by the other at least two x-ray sources, wherein the cross scatter sampling intervals are angularly spaced over a plurality of frames to allow the at least two x-ray sources to concurrently emit radiation throughout at least one frame; deriving scatter correction data for each set of detectors from corresponding cross scatter samples; scatter correcting the projection data with corresponding scatter correction data; and reconstructing the scatter corrected projection data to generate at least one image.