Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse parenchymal opacities and mildly enlarged vascular pedicle are likely due to mild pulmonary edema . The heart size is mildly enlarged , though not significantly changed since ___ . No pleural effusion or pneumothorax is seen . Median sternotomy wires and mediastinal surgical clips are unchanged in positioning and intact . Severe calcification of the aortic knob and mitral valve are unchanged .
    OUTPUT:
    
Mild pulmonary edema .