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 appears at least mildly enlarged . The aorta is tortuous . The mediastinal and hilar contours are otherwise unremarkable . There is no pulmonary edema . Minimal streaky opacity in the left lower lobe likely reflects atelectasis . No pleural effusion or pneumothorax is identified . Mild degenerative changes are seen throughout the thoracic spine .
    OUTPUT:
    
Low lung volumes with left lower lobe atelectasis .