Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right PICC line in unchanged position terminating in the lower SVC . Lung volumes are lower . A moderate left pleural effusion has increased . There is increased opacity at the right lung base . No pneumothorax . Retrocardiac opacity likely reflects a combination of hiatal hernia an atelectasis .
    OUTPUT:
    
Right lower lobe opacity could reflect pneumonia in the correct clinical setting . Other considerations include aspiration or atelectasis .