Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are moderately well expanded with mild bilateral lower lobe atelectasis . Mild vascular congestion is present . No additional focal opacity . Stable moderate cardiomegaly is seen . Mediastinal contour and hila are otherwise unremarkable . No right pleural effusion . Subtle opacity obscuring the left costophrenic angle may represent a pleural effusion or soft tissue . Intact median sternotomy wires , pacemaker wires , and bowel for placement , unchanged appearances previous examination .
    OUTPUT:
    
1 . Stable moderate cardiomegaly with mild vascular congestion . 2 . Mild bilateral lower lobe atelectasis . 3 . Subtle opacity obscuring the left costophrenic angle may represent small pleural effusion or overlying soft tissue .