Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Right - sided central venous catheter is seen with tip likely in the right atrium . Lung volumes are relatively low . There are bilateral interstitial opacities similar to prior suggesting pulmonary edema . There may be a small right - sided pleural effusion with blunting of lateral costophrenic angle . More dense retrocardiac opacity seen . Median sternotomy wires and mediastinal clips again seen . Cardiomediastinal silhouette is difficult to assess given rotation and left base opacity .
    OUTPUT:
    
Persistent pulmonary edema . Retrocardiac opacity potentially due to a combination of atelectasis , effusion and possible consolidation .