Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . As on prior , low lung volumes are seen . Within this limitation , the lungs are grossly clear . Linear opacity at the right lung base is suggestive of subsegmental atelectasis . Cardiomediastinal silhouette is stable . Dual - lead pacing device is again seen . Degenerative changes seen at the right glenohumeral joint . Surgical clips seen in the right upper quadrant .
    OUTPUT:
    
No acute cardiopulmonary process based on this limited , portable examination .