Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . The cardiac silhouette is enlarged but unchanged . There is small bilateral pleural effusions and bibasilar atelectasis . No evidence of pneumothorax . The visualized osseous structures are grossly unremarkable . Median sternotomy wires are in place .
    OUTPUT:
    
Small bilateral pleural effusions minimally increased from prior exam . No acute process .