Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear unchanged . A left - sided pleural effusion has largely resolved . A right - sided pleural effusion appears to contain a less conspicuous right lateral loculated component but probably remains small to moderate in size with associated atelectasis at the right lung base .
    OUTPUT:
    
Persistent mild to moderate right - sided pleural effusion . Decrease in left - sided pleural effusion , not optimally visualized but probably fairly small .