Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , new right lower lobar opacity , particularly appreciated on the lateral view , is concerning for developing infection , in the correct clinical setting . There is no new pleural effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
New right lower lobe subtle opacity is best seen on the lateral view , and concerning for developing infection in the correct clinical setting . Alternatively , if there is a strong clinical suspicion for pulmonary embolism given the age and clinical presentation , a CTA - PE protocol should be obtained .