Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion or pneumothorax . There is subtle opacification at the bilateral lung apices , suggestive of scarring which was better evaluated on the prior CT chest dated ___ . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities are identified . There is no free air under the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .