Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ , there is substantial decrease in left pleural effusion , consistent with history of thoracentesis . Bilateral pleural effusions are small , if any . The left lung has re-expanded and is grossly clear . Left basal opacity may reflect atelectasis or pneumonia . Mediastinal vessels are mildly enlarged without evidence for pulmonary edema . Moderate to severe cardiomegaly is long standing . Sternotomy wires are aligned and intact . Aortic knob calcification is unchanged .
    OUTPUT:
    
Small residual bilateral pleural effusions .