Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes . Left basilar opacity is seen which may be due to infection or aspiration . There is a right base opacity to a lesser extent , which may in part be due to overlap of vascular structures ; however , additional site of consolidation may be present . Cardiac and mediastinal silhouettes are unremarkable . No large pleural effusion or evidence of pneumothorax is seen .
    OUTPUT:
    
Patchy left basilar opacity raises concern for consolidation , which may be due to aspiration or infection .