Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiographs demonstrates bilateral low lung volumes with crowding of vascular structures . Minimal pulmonary edema evident . Minimal blunting of the bilateral costophrenic angles may indicate small pleural effusions . Apparent widening of the mediastinum and increased cardiac silhouette is likely reflective of portable technique , low lung volumes , patient positioning and postoperative state . No osseous abnormality identified .
    OUTPUT:
    
Left - sided chest tube in place . No pneumothorax . Mild pulmonary edema . Post-operative appearance of cardiomediastinum .