Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy . Right IJ central line tip in low SVC . Very shallow inspiration . Left chest tube has been removed . No pneumothorax . Mildly improved left basilar opacity . Probable tiny left pleural effusion , improved . Mild right basilar opacity , likely atelectasis , more prominent .
    OUTPUT:
    
Mildly improved left basilar opacity . Mildly worsened right basilar opacity .