Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity identified at the right lung base , likely atelectasis . The lungs are otherwise clear without confluent consolidation or overt pulmonary edema or large effusion . The cardiac silhouette is enlarged but similar compared to prior . Atherosclerotic calcifications are noted at the aortic arch . Degenerative changes seen at the glenohumeral joints bilaterally .
    OUTPUT:
    
No acute cardiopulmonary process .