Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hazy left lower lobe opacity may represent pneumonia . There is no effusion or pneumothorax . There is mild pulmonary vascular congestion and possible trace interstitial edema . There is streaky left basilar and right perifissural atelectasis . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen . Sternal wires and surgical clips appear similar to prior .
    OUTPUT:
    
In the appropriate clinical setting , hazy left lower lobe opacity could represent pneumonia .