Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Mediastinal contours , hila , and cardiac silhouette are normal . No pneumothorax or pleural effusion . Blunting of the right costophrenic angle is unchanged from previous chest CT , seen to correspond to pleural thickening .
    OUTPUT:
    
No acute cardiopulmonary process .