Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The cardiomediastinal and hilar contours are within normal limits . The aorta is tortuous . Lung volumes are somewhat low . There is a small right pleural effusion and minimal right lower lobe atelectasis , not significantly changed from the prior examination . A small linear opacity adjacent to the left hilum is consistent with some platelike atelectasis . There is no pneumothorax .
    OUTPUT:
    
Small right pleural effusion and adjacent pulmonary opacity suggesting atelectasis not significantly changed from the prior examination . Small platelike opacity in the left midlung is consistent with atelectasis .