Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Chronic left lung base pleural thickening is not significantly changed from prior chest radiograph referenced from Atrius . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
1 . Chronic left lung base pleural thickening is not significantly changed from prior . 2 . No acute intrathoracic process .