Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Low lung volumes crowd the pulmonary vasculature and accentuate bibasilar atelectasis and heart size . No evidence of pneumonia . Mediastinal and hilar contours are normal . No evidence of pulmonary edema .
    OUTPUT:
    
Bibasilar atelectasis . No evidence of pneumonia .