Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright frontal chest radiograph demonstrates improvement in aeration of the right lung base . The left basal opacification is unchanged , as is a moderate left pleural effusion . The cardiac silhouette remains moderately enlarged , the mediastinal contours are unchanged but are notable for central venous engorgement . There is no pneumothorax . A nasogastric tube is in place , the tip is not seen though it does pass below the diaphragm .
    OUTPUT:
    
Interval improvement in right pleural effusion and right lung base aeration , with residual atelectasis and effusion present in the left lung base . No pneumothorax .