Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . There is a tortuous thoracic aorta . Heart size is top - normal . The hila are within normal limits . Linear opacities at the right mid lung and right lower lobe may represent platelike atelectasis , however it is difficult to exclude developing or interstitial pneumonia . Otherwise , the lungs are clear . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Linear opacities in the right middle and lower lobes are nonspecific , possibly platelike atelectasis , however developing , especially interstitial pneumonia ( e .g . viral or atypical bacterial ) , could also give this appearance 2 . No evidence of diffuse interstitial lung abnormality .