An imaging system includes a rotating gantry, a bed, plural nuclear medicine (NM) imaging detectors, and a processing unit. The rotating gantry has a bore. The NM detectors are disposed about the bore of the gantry. The NM detectors each have an in-plane field of view, and are configured to pivot about a corresponding axis with respect to the gantry to change the in-plane field of view. The processing unit is configured to acquire first NM imaging information at a first gantry rotational position, with the in-plane fields of view of the NM imaging detectors parallel to a predetermined direction； actuate the gantry to rotate to a second gantry rotational position； actuate the NM imaging detectors to pivot such that the in-plane fields of view are parallel to the predetermined direction； acquire additional NM imaging information at the second gantry rotational position； and reconstruct a planar image of the object.
