Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Mild basilar atelectasis noted . Lungs otherwise clear . No large effusion or pneumothorax . Heart is mildly enlarged . Mitral annular calcifications noted . Mediastinal prominence likely reflects ectatic vasculature . Bony structures appear intact .
    OUTPUT:
    
No acute findings . Mild cardiomegaly .