Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen tiny right apical pneumothorax is not definitely seen . There is a small right pleural effusion , stable . Sternotomy . Cardiac enlargement , stable . Few linear bands of atelectasis are stable in the lower lungs . Improved opacity of the left mid lung laterally .
    OUTPUT:
    
No definite pneumothorax . Stable small right pleural effusion .