Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There are linear opacities at the lung bases pain laterally , these could potentially be due to atelectasis given the relatively low lung volumes . Blunting of the costophrenic angles , left more so than right and could potentially be technical in nature due to overlying soft tissues . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Linear bibasilar opacities likely atelectasis given the low lung volumes however superimposed pneumonia is not completely excluded . If the patient is amenable , PA and lateral views may offer additional detail .