Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 20 :39 are submitted .
    OUTPUT:
    
Faint subtle opacity at the left base may reflect atelectasis , although an early pneumonia can not be entirely excluded . Clinical correlation is recommended . Lung volumes have slightly diminished . There is no pulmonary edema . No pneumothorax . Overall cardiac and mediastinal contours are stable .