Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with 1 day earlier , there is possible subtle improvement in the right base and left mid zone opacities . Otherwise I doubt significant interval change . ET tube , NG tube and right subclavian central line are similar in configuration . No pneumothorax is detected . Cardiomediastinal silhouette is possibly minimally improved , as are inspiratory volumes . Retrocardiac opacity , consistent with left lower lobe collapse and / or consolidation persist . Diffuse infiltrates in both lungs remain present , slightly improved as described above . No gross effusions identified , though small effusions might not be apparent .
    OUTPUT:
    
Diffuse infiltrates , slightly improved compared with 1 day earlier , could reflect either infectious infiltrates or asymmetric pulmonary edema . Left lower lobe collapse and / or consolidation persists .