Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small left pleural effusion with associated compressive atelectasis at the left lung base . There is no definite focal consolidation . The right lung is clear . There is no pneumothorax . The cardiomediastinal silhouette is stable and unremarkable . Osseous structures are unremarkable . The lungs are hyperinflated consistent with COPD .
    OUTPUT:
    
Small left pleural effusion with associated compressive atelectasis . No definite pneumonia . Referring physician could not be found on the paging system , so all of these findings were entered into the critical result dashboard by Dr . ___ .