Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral views of the chest provided . Due to large body habitus and low lung volumes , evaluation is limited . There is a linear density in the left lower lung which is most compatible with atelectasis . No convincing signs of pneumonia . No large effusion or pneumothorax . Cardiomediastinal silhouette is stable . Bony structures are intact .
    OUTPUT:
    
Left basilar atelectasis . Otherwise , normal .