Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exams from ___ and ___ . Superiorly , the lungs are clear , and there is no evidence of pulmonary vascular congestion . Best seen on the lateral view is increased density projecting over the spine inferiorly . There is adjacent linear opacity suggestive of associated atelectasis . Cardiac silhouette is enlarged , similar to prior . Median sternotomy wires again noted . Multiple right lateral rib fractures are again seen .
    OUTPUT:
    
New basilar opacity projecting over the spine likely on the left level may be due to combination of effusion , consolidation or atelectasis . No other change .