Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are relatively low lung volumes . There is mild increase in the interstitial markings suggesting mild interstitial edema . There is mild bibasilar atelectasis . No large pleural effusion is seen . Thoracic scoliosis is again noted . The aorta remains calcified and tortuous . The cardiac silhouette is not enlarged . A linear radiopaque structure is seen projecting over the lower neck , unclear whether internal or external to the patient . There is diffuse osteopenia , and there are degenerative changes at both shoulder and acromioclavicular joints .
    OUTPUT:
    
Mild increase in the interstitial markings diffusely bilaterally , mild interstitial edema .