Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive bibasilar opacities slightly improved compared with the prior study . A uniform opacity overlying the right lung field suggests at least a moderate pleural effusion . A calcified right paratracheal structure corresponds to a calcified mediastinal lymph node . The tracheostomy tube , a right - sided chest tube , right IJ central venous catheter , and right PICC line appear in unchanged position . Sternotomy wires are intact .
    OUTPUT:
    
1 . Slight interval improvement in extensive bibasilar opacities . 2 . Persistent right pleural effusion . 3 . Unchanged position of lines and tubes .