Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal portable view of the chest was performed . There is no pleural effusion or pneumothorax . Opacification at the left lung base is new from the prior study . The cardiac and mediastinal contours are normal . The hilar structures and pleural surfaces are unremarkable . The imaged upper abdomen is grossly unremarkable .
    OUTPUT:
    
New opacification of the left low lung raises concern for possible aspiration .