1. A method of reconstructing a computed tomography image slice, the method comprising: sequentially in time obtaining a plurality of attenuation data sets of a target; segmenting each of the attenuation data sets into time-sequential segments; performing limited angle reconstructions of the target using pairs of segments that substantially correspond in time from the plurality of attenuation data sets to create individual interim images; and combining the individual interim images to create a full image of a slice of the target.