Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Cardiac silhouette size is normal . The mediastinal and hilar contours are stable with tortuosity of the thoracic aorta again noted . Calcification of the aorta is also redemonstrated particularly at the aortic arch . There is crowding on the bronchovascular structures , but no pulmonary edema is demonstrated . Minimal hazy opacification in the left lung base likely reflects atelectasis . No pleural effusion or pneumothorax is present . No acute osseous abnormality is definitively noted . A lamellated calcified structure in the right upper quadrant measuring 19 mm is compatible with a gallstone , as better seen on the CT from ___ .
    OUTPUT:
    
Low lung volumes with minimal left basilar atelectasis . Gallstone .