Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi upright portable chest radiograph provided . Cardiomegaly is stable . There is mild improvement in the previously noted pulmonary edema . No large effusion is seen though the left lung base is poorly visualized . No pneumothorax . Bony structures intact .
    OUTPUT:
    
Perhaps marginal interval improvement in pulmonary edema .