Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates slight improvement in bibasalar pleural effusions and adjacent atelectasis . Cardiomediastinal and hilar contours are unchanged . A right - sided internal jugular central venous line ends at the cavoatrial junction . There is no pneumothorax . A subdiaphragmatic drain is in unchanged position .
    OUTPUT:
    
Bibasalar pleural effusions with adjacent atelectasis is slightly improved from prior .