Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral patchy airspace opacities are overall increased in comparison to ___ , particularly in the right perihilar region . Calcified pleural plaques are unchanged . There is no pneumothorax .
    OUTPUT:
    
Bilateral patchy airspace opacities are increased in comparison to the prior study . This may be partially due to lower lung volumes , however mildly increased pulmonary edema or underlying consolidations would be difficult to exclude . Clinical correlation is recommended .