Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The lungs are well expanded and clear . Minimal blunting of the left costophrenic angle likely reflects pleural thickening . There is no pleural effusion or pneumothorax . Cardiac and mediastinal contours are normal . Abdominal surgical clips are in unchanged positions .
    OUTPUT:
    
No acute cardiopulmonary abnormality .