Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is mildly enlarged . Mediastinal and hilar contours are unchanged with atherosclerotic calcifications noted at the aortic knob . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . The pulmonary vasculature is normal . No acute osseous abnormalities visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .