Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with earlier the same day and allowing for technical differences , no gross change is identified . Diffuse bilateral opacities are similar in appearance and distribution . Subtle differences in the right mid and lower zones could be accounted for by differences in film technique . Mediastinum remains midline . No gross effusion is identified . No pneumothorax is detected . No free air seen beneath the diaphragm .
    OUTPUT:
    
Allowing for technical differences , doubt significant interval change . No gross effusions .