Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A faint opacity at the left lung base . ___ represent atelectasis or early pneumonia in the proper clinical setting . Mild hyperinflation suggests emphysematous changes . A right Peck dual - chamber pacemaker and its leads project in expected location . The cardiomediastinal silhouette is within normal limits . There is moderate dextroscoliosis of the thoracic spine . There is no displaced rib fracture . There is no pneumothorax , pulmonary edema , or definite pleural effusion .
    OUTPUT:
    
Faint opacity at the left lung base may represent atelectasis or early pneumonia the proper clinical setting .