Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding AP and lateral chest examination of ___ . Status post sternotomy and aortic vascular repair as before . Appearance of superior mediastinal structures has not changed during the latest interval , and no pneumothorax has developed . Heart size remains unchanged and no pulmonary vascular congestive pattern is identified . Comparing the frontal views with the previous examination demonstrates that a right - sided pleural effusion has developed which mildly blunts the lateral pleural sinus . Also slight increase of left - sided lateral pleural sinus blunting is noted . When comparing the findings on the lateral views , the previously present pulmonary parenchymal infiltrate with atelectatic component in the posterior segment of the left lower lobe has disappeared . There remains evidence of small pleural effusions extending into both posterior pleural sinuses . No pneumothorax can be identified on the frontal view in the apical area .
    OUTPUT:
    
The amount of bilateral pleural effusion matches that found on most recent chest CT of ___ .