Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is no definite sign of pneumonia or CHF . There is minimal left basal atelectasis noted . No effusion or pneumothorax . The heart and mediastinal contours appear normal . No free air below the right hemidiaphragm .
    OUTPUT:
    
No definite signs of pneumonia . Mild left basal atelectasis .