Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest was obtained . There is mild enlargement of the cardiac silhouette . The lungs are clear without focal or diffuse abnormality . No pneumothorax or pleural effusion . Osseous structures are unremarkable . Median sternotomy wires are intact .
    OUTPUT:
    
Mild cardiomegaly . No focal consolidation .