Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Moderate enlargement of the cardiac silhouette is noted . The thoracic aorta demonstrates atherosclerotic calcifications of the non . Crowding of the bronchovascular structures is demonstrated without overt pulmonary edema . Patchy opacities in the lung bases likely reflect areas of atelectasis . Elevation of the right hemidiaphragm is unchanged . No pneumothorax or pleural effusion is present . There are moderate multilevel degenerative changes seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis . Chronic elevation of the right hemidiaphragm .