Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , which has resulted in bibasilar patchy atelectasis . Apparent parenchymal abnormalities are artificially increased by the presence of pleural calcifications . No focal consolidation , pleural effusion or pneumothorax . Heart is mildly enlarged . Prominence of the mediastinum is exacerbated by low lung volumes . Hilar contours are unremarkable .
    OUTPUT:
    
Low lung volumes without an acute cardiopulmonary process .