Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small to moderate right pleural effusion appears decreased as compared to the prior study . There appears to be some volume loss of the right lung although there is improved aeration as compared to the prior study . The left lung is clear . No left pleural effusion is seen . No definite focal consolidation . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
Small moderate right pleural effusion appears decreased compared to the prior study ; underlying right base consolidation / pneumonia is difficult to exclude . Some continued volume loss of the right lung , but with significantly improved aeration as compared to the prior study .