Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Small right pleural effusion persists and cardiac silhouette is larger . There is no left pleural effusion . Right infrahilar peribronchial opacification is either early edema or mild pneumonia . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
1 . Small right pleural effusion is unchanged since ___ exam . 2 . New mild cardiomegaly and / or pericardial effusion . 3 . Right basal edema , or early pneumonia . Distinguishing between the two , and evaluating possible pericardial effusion could be achieved by Chest CT performed with the patient prone . I discussed these findings by telephone with housestaff [ details addended ] .