Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear , well - expanded lungs without focal consolidation , pleural effusion , or pneumothorax . The cardiac silhouette remains moderately enlarged and is unchanged . The pulmonary vasculature appears normal without evidence of failure . The mediastinal contours are unchanged , with unchanged calcification of the aortic knob . A single - lead pacemaker is unchanged in appearance . There are stable rib deformities on the right side , the result of prior fracture .
    OUTPUT:
    
Moderate cardiomegaly , without evidence of pneumonia or CHF .