Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persistent pulmonary opacities , vascular engorgement and septal lines refkect mild pulmonary edema . Small left pleural effusion can not be excluded . Low lung volumes limit assessment of cardiomediastinal silhouette though the cardiac size appears mildly enlarged .
    OUTPUT:
    
Unchanged mild pulmonary edema with likely small left pleural effusion .