Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral small pleural effusions , left more than right are unchanged . Compared to the prior radiograph from ___ , left lower lung atelectasis has minimally improved . Patient is status post median sternotomy with intact sternal sutures . There are no lung opacities concerning for pneumonia . There is no pneumothorax .
    OUTPUT:
    
Bilateral small pleural effusions are unchanged since ___ . Left lower lung atelectasis has improved .