Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is no large pleural effusion or pneumothorax . Lung volumes are low . Increased opacity in the left apex is noted , which may reflect interval development of atelectasis or aspiration . The pulmonary vasculature is within normal limits . The upper abdomen is unremarkable . Please note that the left costophrenic angle is not completely captured on the current exam .
    OUTPUT:
    
Increased opacity at the left apex , which may represent atelectasis or aspiration .