Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is mild basilar atelectasis noted on the frontal view at the left lung base . There is no evidence of focal consolidation or signs of pneumonitis . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild left basal atelectasis . No definite signs of alveolar injury .