Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright chest radiograph ___ at 05 :07 is submitted .
    OUTPUT:
    
Endotracheal tube and bilateral internal jugular central lines are unchanged in position . Status post median sternotomy for valve replacement with stable postoperative cardiac and mediastinal contours . Slightly worsening diffuse bilateral parenchymal process , but more focally in the left upper lobe and at both bases . Although this may represent a worsening infectious process , this all could be related to progression of pulmonary and interstitial edema . Clinical correlation is recommended . No pneumothorax .