Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An NG tube is present . Although the infra diaphragmatic portion of the tube is not well seen , it does pass beneath the diaphragm . The cardiomediastinal silhouette and background COPD appear unchanged . There is vascular plethora consistent with mild CHF and interstitial edema . A small left effusion and minimal blunting of the right costophrenic angle are similar to the prior film . There is patchy opacity at the left base similar to the prior film . The possibility of an early infiltrate can not be entirely excluded , but the appearance is grossly unchanged and no frank consolidation is seen . Minimal atelectasis at the right base . Prominent right paratracheal soft tissues are similar to the prior film .
    OUTPUT:
    
1 . Patchy opacity left base . The possibility of an early infiltrate can not be entirely excluded , but the appearance is grossly unchanged compared with ___ and no frank consolidation is seen . 2 . Mild CHF / interstitial edema , similar to the ___ chest x-ray .