Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs are provided . There are linear opacities at the right base that are unchanged from the prior study and represent scarring . A subtle left retrocardiac opacity is new . The lungs are otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unchanged . There are degenerative changes in the thoracic spine .
    OUTPUT:
    
1 . New left retrocardiac opacity which may represent pneumonia in the correct clinical setting . 2 . Chronic scarring peripherally at the left lung base . These findings were discussed with Dr . ___ by Dr . ___ ___ telephone at 1 :20 p .m .