Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Vague opacity overlying the left heart border is not confirmed on the lateral view but is new since ___ . No pleural effusion or pneumothorax . The heart size and cardiomediastinal contours are normal .
    OUTPUT:
    
Vague left lower lung opacity may represent developing pneumonia in the appropriate clinical scenario . Findings were communicated via phone call by Dr . ___ to Dr . ___ ___ on ___ at ___ PM .