Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , moderate bilateral perihilar and basilar opacities are increased . However , this may be technical in nature . Moderate cardiomegaly is unchanged . Support devices are in appropriate position . No pneumothorax .
    OUTPUT:
    
1 . Interval increase in moderate bilateral perihilar and basilar opacities since ___ .