Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Low lung volumes limit the evaluation . There is mild elevation of the right hemidiaphragm . There is mild right basal atelectasis . Otherwise the lungs appear clear . The heart is moderately enlarged . The mediastinal contour is normal . Tracheobronchial tree calcifications are noted . No definite rib fractures are seen .
    OUTPUT:
    
Cardiomegaly . No acute findings .