Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable semi-erect chest radiograph was obtained the lungs are well expanded . Blunting of the right costophrenic angle may be due to a small pleural effusion . A right lower lobe calcified pleural plaque is unchanged . There is no focal consolidation or pneumothorax . Cardiac and mediastinal contours are normal .
    OUTPUT:
    
Blunting of the right costophrenic angle may be due to small pleural effusion .