Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP semi upright chest radiograph was obtained . Aeration of the left lung has significantly improved . Residual retrocardiac opacity obscures the left hemidiaphragm . There is a moderate effusion on the right . A right PICC tip of right - sided PICC line remains at the subclavian SVC junction . A new left - sided internal jugular line tip is in the upper SVC . Mild cardiomegaly is unchanged .
    OUTPUT:
    
1 . Significantly improved aeration of the left lung with residual atelectasis in the left lower lobe . 2 . Small to moderate right pleural effusion .