Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , effusion , or pneumothorax . Mild subpleural fibrosis in the right lung was better seen on prior CT . The cardiomediastinal silhouette appears widened , but corresponds to mediastinal fat on prior CT . Imaged osseous structures show moderate degenerative changes . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process .