Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuate bronchovascular markings . There is no pleural effusion or pneumothorax . Subtle lung base opacities are noted . Remoted left sided rib fractures are redemonstrated .
    OUTPUT:
    
Subtle lung base opacities may represent atelectasis , developing infection not excluded in the appropriate clinical setting .