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 is mildly enlarged . There is unchanged tortuosity of the thoracic aorta . The mediastinal contours are otherwise normal .
    OUTPUT:
    
Mild new cardiomegaly , without acute chest pathology .