Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac and mediastinal silhouettes are stable . There are low lung volumes which accentuate the bronchovascular markings . Given this , there appears to be mild pulmonary vascular congestion . Linear left base opacity most likely represents atelectasis , however , infection is not excluded in the appropriate clinical setting . No large pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Low lung volumes , which accentuate the bronchovascular markings . Given this , possible mild pulmonary vascular congestion . Linear left base opacity most likely represents atelectasis , however infection not excluded in the appropriate clinical setting .