Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest are provided . Lung volumes are low . There is mild - to - moderate pulmonary edema with central congestion evident . No large effusion or pneumothorax . The heart size is difficult to assess . The mediastinal contour appears grossly stable . A right humeral head replacement is partially imaged . There is an abnormal appearance of the left humeral head likely chronic .
    OUTPUT:
    
Mild - to - moderate pulmonary edema .