Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral views of the chest provided . Midline sternotomy wires , prosthetic cardiac valve , and mediastinal clips are again noted . Patient is slightly leftward rotated . The heart remains mildly enlarged . There is mild pulmonary edema with vague opacity in the right lower lung which may represent a superimposed pneumonia . A small right pleural effusion is present . No pneumothorax is seen . Vascular calcifications seen . Bony structures appear grossly intact .
    OUTPUT:
    
Mild cardiomegaly , mild pulmonary edema , vague opacity at the right lung base concerning for pneumonia with probable small right pleural effusion .