Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is detected . Heart size appears enlarged , but may be exaggerated by low lung volumes . Pulmonary vasculature appears mildly prominent , but may be exaggerated by low lung volumes .
    OUTPUT:
    
Low lung volumes without radiographic evidence for acute cardiopulmonary process .