Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The arms are down and accordingly the lateral view is underpenetrated and markedly limited . Dense mitral calcifications are present . The cardiac , mediastinal , and hilar contours appear unchanged . A diffuse interstitial abnormality has considerably improved . A streaky left basilar opacities in the left lower lobe is associated with clustered small dilated airways . Small pleural effusions are suspected . With resolution of more widespread opacification , mild peripheral interstitial changes are more apparent in relative terms and unchanged from earlier . Degenerative changes of the spine appear similar . Moderate - to - severe degenerative changes involve each shoulder as before . The bones are probably demineralized .
    OUTPUT:
    
Improving interstitial abnormality . Patchy left basilar opacification with potential pleural effusion . This latter opacity component appears more chronic , although perhaps recently increased somewhat in the recent past ; waxing and waning atelectasis is favored .