Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity projecting over the right hilum , potentially due to superimposed parenchymal opacity . Elsewhere the lungs are clear without consolidation . The cardiomediastinal silhouette is within normal limits . Tortuosity of the descending thoracic aorta is noted with calcifications at its arch .
    OUTPUT:
    
Increased density projecting over the right hilum potentially due to hilar structures with superimposed parenchymal opacity . PA and lateral suggested to further characterize .