Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a heart which is again top normal in size and well - aerated lungs which are clear . No focal consolidation , pleural effusion , or pneumothorax is seen . There is again pleural thickening at the bilateral apices , as well as a nodular opacity projecting over the left upper lung , unchanged dating back to at least ___ . Old fractures of the right fifth and sixth ribs are also unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .