Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The aorta is diffusely calcified and tortuous . Mediastinal and hilar contours are relatively unchanged . Low lung volumes cause crowding of the bronchovascular structures without overt pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . Mild atelectasis is noted in the lung bases . Degenerative changes are again seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .