Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left lower lobe opacity on the frontal radiograph which silhouettes the heart border , possibly reflecting pneumonia . There is no pleural effusion , pulmonary edema or pneumothorax . The heart is top - normal in size .
    OUTPUT:
    
Left lower lobe patchy opacity . In the appropriate clinical setting , this could represent an early pneumonic infiltrate .