Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged , with the heart size appearing top normal . The aorta remains unfolded and diffusely calcified . Pulmonary vasculature is normal . Apart from minimal atelectasis in the lung bases , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is visualized . Cholecystectomy clips are demonstrated within the right upper quadrant of the abdomen .
    OUTPUT:
    
No radiographic evidence for pneumonia .