Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right middle lobe triangular opacity is unchanged and is atelectasis / scarring as seen on prior CT thorax . No acute consolidation . No pleural effusions or pneumothorax . Prominent mediastinal contour on the lateral radiograph could be the right pulmonary artery pulled inferiorly due to volume loss as documented also prior CT thorax from ___ .
    OUTPUT:
    
No acute cardiopulmonary abnormality .