Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates marked improvement of recently seen pulmonary edema . Bibasilar aeration has also improved . There is no confluent consolidation . Trace residual effusion may be present on the right . Cardiomegaly is unchanged . Thoracic aorta is unfolded with atherosclerotic calcifications . The ascending aorta is tortuous , but likely unchanged . A left pectoral dual - channel pacemaker / AICD is in place with leads terminating in the right atrium and right ventricle . Sternotomy wires are intact . Post - CABG changes are present .
    OUTPUT:
    
1 . Significant interval improvement of recent pulmonary edema with trace residual right effusion . 2 . Stable cardiomegaly . 3 . No definite acute cardiopulmonary process .