Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Mild plate - like left basilar atelectasis is noted . Aside from this , the lungs are clear and well inflated . No pleural effusion or pneumothorax is seen . Heart size is difficult to assess but appears grossly stable . Mediastinal contour is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No signs of pneumonia .