Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are normal . Subtle posterior lung base densities are demonstrated corresponding to areas of ground - glass opacity on the recent CT examination likely representing a small component of aspiration and certainly do not look worsened compared to prior study . These densities have no frontal correlate . There are tiny layering posterior bilateral pleural effusions . There is no pneumothorax . Redemonstration of a hiatal hernia .
    OUTPUT:
    
Redemonstration of subtle posterior lung base densities corresponding to ground - glass opacities on prior CT and likely representing aspiration do not appear worsened . Tiny bilateral pleural effusions .