Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Tiny clips are noted projecting over the neck . Streaky left basal opacity may reflect atelectasis though difficult to exclude an early pneumonia in the correct clinical setting . The right lung is clear . No large effusion or pneumothorax . Cardiomediastinal silhouette appears stable with a markedly unfolded and calcified thoracic aorta . The imaged bony structures are intact .
    OUTPUT:
    
Left basal opacity likely atelectasis though difficult to exclude a very early pneumonia . Markedly unfolded thoracic aorta .