Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs . Low lung volumes and bibasilar atelectasis are chronic . Linear opacity in the right upper lobe corresponds to one seen on prior CTA which could be a scar or very slowly growing malignancy of dubious clinical significance in a ___ year old patient . There is no pleural effusion or pneumothorax . Aortic valve replacement is in stable position . Aside from aortic tortuosity , the cardiomediastinal silhouette is normal . No rib fracture is identified .
    OUTPUT:
    
Chronic low lung volumes and bibasilar atelectasis . This examination is not designed for detection of chest cage trauma which is better evaluated with detail views of regions of clinical findings , or Trauma / Torso CT scanning , as appropriate .