Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . Lung volumes remain slightly low , but are slightly improved . Small right pleural effusion with adjacent atelectasis and silhouetting of the right hemidiaphragm is overall unchanged . No pneumothorax . Mild cardiomegaly is unchanged . No edema or focal consolidation .
    OUTPUT:
    
1 . Unchanged small right pleural effusion from ___ . 2 . No pulmonary edema or pneumonia .