Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar atelectasis is noted . The lungs are otherwise clear without lobar consolidation , pleural effusion , pneumothorax , or frank pulmonary edema . The heart is mildly enlarged . Aortic calcifications are noted within the arch . No free intra-abdominal air is identified .
    OUTPUT:
    
Bibasilar atelectasis without acute cardiopulmonary process .