Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent slight blunting of the right costophrenic angle . No focal consolidation or evidence of pneumothorax is seen . The cardiac , mediastinal , and hilar contours are stable .
    OUTPUT:
    
Still blunting of the right cardiophrenic angle may be due to pleural thickening . No significant interval change .