Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is borderline enlarged , unchanged . The mediastinal and hilar contours are similar . No pulmonary edema , pleural effusion or pneumothorax is identified . Patchy opacity within the right lung base likely reflects an area of atelectasis . No acute osseous abnormality is visualized .
    OUTPUT:
    
Minimal right basilar atelectasis . Otherwise , no acute cardiopulmonary abnormality .