Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple calcified nodules seen on prior chest radiographs and better characterized on prior chest CT represent pleural calcifications . Calcification of the aorta and aortic valve noted . No pleural effusion or pneumothorax is seen . Heart size is top - normal . Hilar and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No evidence of pneumonia . Previously characterized pleural calcifications again noted .