Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . Mediastinal and hilar contours are unchanged , with multiple clips noted in the left posterior mediastinum . Aortic knob is calcified . Hilar contours are unremarkable . There is no pulmonary edema . Small bilateral pleural effusions are again demonstrated with associated bibasilar opacities possibly reflecting atelectasis . Left PICC tip remains in unchanged position , terminating in the left brachiocephalic vein . There is no pneumothorax . Cervical spinal fusion hardware is partially imaged .
    OUTPUT:
    
1 . Small bilateral pleural effusions with probable bibasilar atelectasis . 2 . Left PICC tip terminates in the left brachiocephalic vein .