Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . The lungs are clear aside from minimal left lower lobe atelectasis . The heart size is normal . The descending thoracic aorta is mildly tortuous . Aortic calcifications are noted . There are no pleural effusions . No pneumothorax is seen . Multilevel degenerative changes of the thoracolumbar spine are again noted .
    OUTPUT:
    
No acute cardiac or pulmonary process .