Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright frontal radiograph of the chest reveals increased interstitial markings bilaterally and persistent hazy opacity at the periphery of the right upper lobe abutting the minor fissure , possibly representing mild interstitial pulmonary edema superimposed on a background of chronic interstitial abnormality and emphysematous changes . No new focal airspace opacity is appreciated . The right costophrenic sulcus is not included on this image . The heart size is slightly enlarged , stable . The mediastinal and hilar contours are normal . There is no large pleural effusion or pneumothorax detected . Median sternotomy wires are in place .
    OUTPUT:
    
1 . Increased interstitial markings suggesting mild pulmonary edema superimposed on a background of chronic interstitial abnormality and emphysematous change . 2 . Stable mild cardiomegaly .