Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No PICC is seen . The lungs are hyperinflated , suggestive of COPD . Retrocardiac opacity is seen , which may represent atelectasis but can not exclude infection in the right clinical setting . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . A partially imaged catheter is seen overlying the left upper quadrant .
    OUTPUT:
    
No PICC is seen . Retrocardiac opacity , may represent atelectasis but can not exclude infection in the appointmentclinical setting .