Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiac silhouette is mildly enlarged , unchanged . No pulmonary edema or effusion is present . The mediastinal silhouette shows a right - sided aortic arch with mild tortuosity , unchanged . No pleural effusion or pneumothorax is present . Note is made of mild pectus deformity .
    OUTPUT:
    
Unchanged mild cardiomegaly but no evidence of congestive heart failure .