Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . There is no pleural effusion or focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Left lung base opacities are noted . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Left lung base opacities may represent atelectasis or infection in the appropriate clinical setting . Low lung volumes .