Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contour is unchanged . There is no pneumothorax or pleural effusion . Left lower lobe linear atelectasis and elevation of the left hemidiaphragm is noted . There is a right lower lobe opacity present dating back to ___ but more apparent on the current study .
    OUTPUT:
    
Right lower lobe opacity , concerning for pneumonia in the correct clinical setting .