Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube present , tip approximately 0 .1 cm above the carina . NG tube present , tip and side - port beneath diaphragm , with tip extending beyond film . Right IJ central line tip overlies the proximal SVC . No pneumothorax is detected . The cardiomediastinal silhouette is similar , possibly slightly decreased in size . Retrocardiac density is significantly improved , with negligible residua . Minimal subsegmental atelectasis at both bases noted . Hazy opacity at the right costophrenic angle could reflect a small right effusion . Minimal blunting left costophrenic angle remains present , improved compared with previously seen left effusion . Rounded opacity overlying the left lung base is noted , question nipple shadow . ( Review of chest x-ray from ___ , suggests that this represents a nipple shadow ) . Attention to this area on followup films is requested .
    OUTPUT:
    
Significant interval improvement in retrocardiac opacity , with minimal residual subsegmental atelectasis the left lung base . Left pleural effusion has also decreased in size . Right base atelectasis has improved . Small residual right pleural effusion is noted . Probable nipple shadow left lung base . Please see comment above .