Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral pacemaker leads end in the expected locations of the right atrium and right ventricle . Mild opacity in the right mid lung is new from ___ and may represent developing infection in the appropriate clinical setting . Pulmonary vasculature is within normal limits . Heart size is normal . The aorta appears slightly larger than in ___ , which probably due to patient rotation . There is no pneumothorax . Blunting at the left costophrenic sulcus is similar to the prior study . In the left lower lung , a 1 .8 cm nodular opacity likely representing callus formation at a healing rib fracture .
    OUTPUT:
    
1 . Right mid lung opacity may represent early infection . Recommend repeat radiograph after treatment to document resolution . 2 . Left lower lung nodule is probably callus formation at a healing rib fracture . Recommend shallow obliques for confirmation . 3 . No evidence of congestive heart failure . Discussed with Dr . ___ at 12 :07 am ___ .