Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . The lung volumes are low . The cardiac silhouette is borderline enlarged , likely exaggerated due to technique . The mediastinal silhouette is grossly unremarkable given lordotic technique . There is upper zone redistribution , without overt CHF . No definite focal consolidation is identified , however , the lateral film is considerably motion degraded , which limits evaluation . No gross effusion . Small posterior effusions would be difficult to exclude . Note made of old healed rib fractures on both the left and right sides .
    OUTPUT:
    
No definite acute intrathoracic abnormality . No frank consolidation is identified , though patchy basilar infiltrates would be difficult to exclude on these images .