Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . The thoracic aorta remains unfolded , and the mediastinal and hilar contours are stable . Pulmonary vascularity is normal . No focal consolidation , pleural effusion or pneumothorax is present . The extreme right costophrenic angle , however , is excluded from the field of view . There are no acute osseous abnormalities .
    OUTPUT:
    
No radiographic evidence for pneumonia .