Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is subtle right basilar opacity . Elsewhere , lungs are clear . There is no effusion or edema . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . Degenerative changes noted at the shoulders .
    OUTPUT:
    
Subtle right basilar opacity potentially atelectasis noting that in the setting of productive cough , infection would be possible .