Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest was compared to reference scan performed same day at outside institution . Lower lung volumes are seen on the current exam with secondary crowding of the bronchovascular markings . There is also left basilar atelectasis . There is no large confluent consolidation . Cardiac silhouette is enlarged and there is a tortuous partially calcified aorta . No definite rib fracture is identified on this single AP view .
    OUTPUT:
    
Cardiomegaly without a definite acute cardiopulmonary process . No displaced fracture identified ; however , if clinical concern , dedicated rib series should be performed as this exam is limited .