Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lower lobe opacity is much improved on today 's exam . Given the great improvement in the time frame , aspiration pneumonitis is likely etiology . Normal lung volumes . No pneumothorax no pleural effusions . Cardiomediastinal borders and hilar structures are normal .
    OUTPUT:
    
Resolving right lower lobe opacity likely secondary aspiration pneumonitis .