Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs , without pleural effusion or pneumothorax . The cardiac silhouette remains enlarged and is unchanged in comparison with prior . The mediastinal contours are normal . The pulmonary vasculature is normal .
    OUTPUT:
    
Cardiomegaly , without acute cardiopulmonary process .