Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Multiple sternal wires , cardiac valve , right - sided PICC , and left - sided pacemaker are unchanged in position since the ___ study . The heart is mildly enlarged . There is no pneumothorax or pleural effusion . Bilateral linear opacities remains stable , likely reflecting atelectasis .
    OUTPUT:
    
No interval change since ___ . Specifically , no superimposed consolidation detected .