1. A nuclear medicine (NM) multi-head imaging system comprising: a gantry defining a bore configured to accept an object to be imaged; plural detector units mounted to the gantry, each detector unit defining a corresponding view oriented toward a center of the bore and configured to acquire imaging information over a sweep range corresponding to the corresponding view; and at least one processor operably coupled to at least one of the detector units, the at least one processor configured to: dynamically determine, during a primary image acquisition configured to obtain information for reconstructing an image, at least one boundary of an acquisition range corresponding to an uptake value of the object to be imaged for at least one of the detector units, wherein the acquisition range is smaller than sweep range, and control the at least one detector unit to acquire imaging information over the acquisition range.