Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The mediastinal and hilar contours appear unchanged . A linear left basilar opacity suggests minor atelectasis . Mild blunting of the left costophrenic angle suggests a persistent pleural effusion . There is no evidence for pleural effusion on the right .
    OUTPUT:
    
Small left - sided pleural effusion and patchy basilar opacity suggesting atelectasis .