Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An NG tube is present --___ tip extends beneath the diaphragm to overlie the stomach . A sideport if present , likely also overlies the stomach . Rotated positioning . Allowing for this , the cardiomediastinal silhouette is probably unchanged . There is upper zone redistribution with mild vascular plethora . There is patchy opacity at the left lung base , improved compared with ___ . Minimal subsegmental atelectasis the right base is also present . The right costophrenic angle is obscured by overlying anatomy and lines . No gross right effusion . A small left effusion would be difficult to exclude no pneumothorax is identified . Partially imaged partially visualized posterior spinal fixation hardware is noted in the lumbar spine . Residual oral contrast is seen in the colon in the descending colon , with scattered contrast filled diverticuli noted .
    OUTPUT:
    
NG tube tip overlies the stomach . Mild CHF --___ is similar , question slightly worse , compared 1 day earlier . Interval improvement in left lower lobe opacity , with some residual left base opacity noted . Minimal atelectasis the right base is unchanged . Probable small left effusion . Small right effusion can not be excluded , due to obscuration of the lower right chest wall and costophrenic angle .