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 mild to moderately enlarged . Coronary artery stent is demonstrated . Mediastinal and hilar contours are unremarkable with crowding of the bronchovascular structures noted . No pulmonary edema is visualized . Streaky opacities in the lung bases likely reflect areas of atelectasis , without focal consolidation , pleural effusion or pneumothorax detected on this supine exam . Multilevel degenerative changes are noted within the thoracic spine .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .