Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse airspace opacity causing obscuration of the right heart border and projecting over the heart on the lateral view . Findings are consistent with a right middle lobe pneumonia . No pneumothorax , pulmonary edema , or significant pleural effusion is present . The heart size is normal .
    OUTPUT:
    
Right middle lobe pneumonia .