Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the recent prior study , there is no significant change . Tracheostomy tube and right PICC line are unchanged in position . Pacemaker , sternotomy wires , and multiple surgical clips projecting over the upper abdomen . Opacification along the right lower lung medially and left lower lung laterally is unchanged and probably represents atelectasis . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
No substantial change compared to the prior examination .