Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable supine view of the chest . There is no focal consolidation , effusion , or pneumothorax . The heart appears mildly enlarged . Hilar and mediastinal contours are normal . Calcified tracheobronchial tree noted . Imaged osseous structures are intact . No displaced rib fractures are identified .
    OUTPUT:
    
Mild cardiomegaly . Otherwise unremarkable . If there is strong concern for rib fracture , dedicated rib series may be obtained .