Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided demonstrate linear densities in the lower lungs , most compatible with linear plate - like atelectasis . No large consolidation , effusion , or pneumothorax is seen . The heart and mediastinal contours are normal . The imaged bony structures are intact .
    OUTPUT:
    
Mild bibasilar plate - like atelectasis . No signs of pneumonia or CHF .