Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Mild left basal platelike atelectasis noted . Otherwise lungs are clear . No evidence of pneumonia or edema . No large effusion or pneumothorax . The heart and mediastinal contours appear normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Platelike atelectasis in the left lung base , no convincing signs of pneumonia .