Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aeration of the lungs has slightly improved since prior exams . Otherwise , no significant interval change . Diffuse , bilateral patchy opacities with air bronchograms are unchanged . Small left pleural effusion is also unchanged . Cardiomediastinal silhouette is unchanged . No pneumothorax .
    OUTPUT:
    
Slight interval improvement in lung aeration , otherwise no significant interval change in diffuse bilateral patchy airspace opacities which can be seen with multifocal pneumonia or ARDS .