Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are faint opacities in both lower lobes , suspicious for aspiration or pneumonia . It is also possible that the left basilar opacity may reflect atelectasis in the setting of persistent left hemidiaphragm elevation . Upper lungs are clear . Minimal blunting of the left costophrenic angle suggests trace pleural effusion . No pneumothorax . No acute osseous abnormalities are identified .
    OUTPUT:
    
Bibasilar opacities are suspicious for aspiration or pneumonia , potentially with superimposed atelectasis at the left lung base . Trace left pleural effusion .