Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The stent is not visualized . There has been some interval partial clearing of the opacity seen in the upper lobe on the most recent study from ___ . However , there continues to be a right upper lobe infiltrate . The right lower lobe continues to have volume loss / infiltrate . The left heart border is obscured and is unclear if there is volume loss or infiltrate in the left lower lobe
    OUTPUT:
    
Compared to the prior study there has been some improvement in the aeration of the right upper lobe and worsening in the aeration of the left lower lobe