Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is exaggerated by low lung volumes , although there is likely mild cardiomegaly . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes and mild cardiomeagly . No evidence of acute intrathoracic abnormality .