Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are extremely low , resulting in bronchovascular crowding . No overt interstitial edema is identified . There is plate - like atelectasis within the left lung base . No confluent consolidation is evident . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits on this portable AP examination .
    OUTPUT:
    
No evidence of pulmonary edema . Subsegmental left basilar atelectasis .