Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is unchanged . There is mild tortuosity of the thoracic aorta . There is no focal lung consolidation . There is no pleural effusion or pneumothorax . Nodular left lower lobe opacity ___ , is seen on the current study , most likely corresponding to lingular atelectasis seen on the CT abdomen from ___ .
    OUTPUT:
    
No radiographic explanation for chest pain .