Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Midline sternotomy wires again noted . The heart remains mildly enlarged . No focal consolidation , effusion or pneumothorax is seen . No overt edema . Unfolded thoracic aorta noted . Imaged bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly , no signs is superimposed edema or pneumonia .