Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Midline sternotomy wires and prosthetic cardiac valve as well as mediastinal clips are noted . There is bilateral interstitial edema with a small right pleural effusion . There is poorly defined airspace opacity in the right lung base which could represent pneumonia . The heart is mildly enlarged . The hila is engorged . No pneumothorax is seen . Bony structures intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild cardiomegaly , interstitial edema , small right pleural effusion . Ill - defined opacity in the right lung base is concerning for pneumonia . Followup to resolution is advised .