Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky lateral left base opacity is most likely due to atelectasis / scarring . There is slight blunting of the posterior costophrenic angle on the lateral view which may be due to trace pleural effusion . No pneumothorax is seen . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Streaky lateral left base opacity most likely due to atelectasis / scarring . Slight blunting of posterior costophrenic angle in the lateral view may be due to trace pleural effusion .