Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lungs are clear without focal consolidation , effusion or pulmonary vascular congestion . Calcified granuloma again seen at the right lung base . There is no pneumothorax . The cardiomediastinal silhouette is within normal limits . Pneumomediastinum identified on prior chest CT is not definitively identified by this chest x-ray . There is no subcutaneous gas identified in the neck . There is no free intraperitoneal air . Osseous structures are unremarkable .
    OUTPUT:
    
Known pneumomediastinum identified on chest CT from one day prior is not clearly identified by this plain film .