Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates a persistent left - sided pleural effusion with collapse of the left lower lobe , not significantly changed from ___ . The left upper lobe is well aerated . There is a small right - sided pleural effusion with some adjacent atelectasis , also not significantly changed from the prior study . Cardiomediastinal and hilar contours are unchanged . Left - sided subclavian central venous line ends at the cavoatrial junction .
    OUTPUT:
    
Persistent left - sided pleural effusion with collapse of the left lower lobe .