Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exam from ___ . Linear opacity at the right lung base is most suggestive of atelectasis versus scarring . The lungs are otherwise clear without consolidation or evidence of vascular congestion . There is no effusion . The cardiac silhouette is enlarged but stable . Triple - lead pacing device again seen . There is widening of the left acromioclavicular joint which is old . Degenerative changes are seen at the right glenohumeral joint .
    OUTPUT:
    
No acute cardiopulmonary process .