Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are stable with calcification of the aortic knob . Widening of the right paratracheal stripe is stable since ___ but new since ___ . There is no pleural effusion or pneumothorax . Patchy opacification at the left lung base may be consistent with atelectasis , aspiration , or pneumonia in the correct clinical setting . The pulmonary vasculature is within normal limits .
    OUTPUT:
    
1 . Left lower lobe consolidation which may be consistent with aspiration or pneumonia in the correct clinical setting . 2 . Widening of the right paratracheal stripe , which is new since ___ but stable since ___ . While this may represent developing tortuosity of mediastinal vasculature , a PA chest radiograph is recommended on a nonurgent basis for further evaluation .