Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate and partly loculated left pleural effusion is not significantly changed since ___ . There is no pneumothorax . Left lower lobe atelectasis has , however , improved . The right lung is unremarkable . Prior sternotomy was done for CABG .
    OUTPUT:
    
Grossly unchanged moderate , partly loculated left pleural effusion .