1. An imaging system comprising: a gantry having a bore therethrough; a bed that is translatable between a first axial position and a second axial position along an axis of the bore of the rotating gantry, the bed configured to support an object to be imaged, the first axial position having a first field of view corresponding to a first portion of the object, the second axial position having a second field of view corresponding to a second portion of the object that is different from the first portion; plural nuclear medicine (NM) imaging detectors disposed about the bore of the gantry, the NM imaging detectors having an axial field of view; and a processing unit operably coupled to the imaging detectors, the processing unit configured to: acquire first NM imaging information of the object from the imaging detectors with the imaging detectors in the first axial position; iteratively actuate the gantry in a series of steps back and forth between the first axial position and the second axial position, wherein the series of steps comprises plural steps at each of the first and second axial positions; acquire additional NM imaging information of the object at each of the steps; and reconstruct an image of the object using the first NM imaging information and the additional NM imaging information, wherein the image corresponds to an axial field of view that is larger than the axial field of view of the imaging detectors.