Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A subtle right lower lobe opacity at the costophrenic angle is new as compared to the prior examination . There is no pleural effusion or pneumothorax . The descending thoracic aorta is noted to be tortuous . The cardiomediastinal silhouette is otherwise within normal limits .
    OUTPUT:
    
New , right lower lobe airspace opacity compatible with pneumonia in the appropriate clinical setting .