Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise unchanged . The pulmonary vascularity is normal . Lungs are clear without focal consolidation . Blunting of the left costophrenic angle posteriorly is chronic , likely reflecting mild pleural thickening . No pleural effusion or pneumothorax is detected . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No radiographic evidence for pneumonia .