Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally with mild improvement in pulmonary edema . No pneumothorax , pleural effusion or new focal opacity . Heart size is mildly enlarged with normal mediastinal contour and hila . Aortic arch calcifications and a tortuous nondilated aorta noted . No bony abnormality .
    OUTPUT:
    
Mild interval improvement in pulmonary edema .